Natural Hazards Flashcards

(289 cards)

1
Q

what is a natural hazard

A

a natural hazard is a natural event that threatens people or has the potential to cause damage destruction and death

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2
Q

what is an atmospheric hazard

A

this is created in the atmosphere by the movement of air and water weather

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3
Q

what is a geological hazard

A

this is created by the movement of the earths tectonic plates or surface rocks and soil tectonics

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4
Q

what is a hydro logical hazard

A

this is created by rivers seas or oceans

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5
Q

what is a risk

A

this is the chance of probability of being affected by natural event. People who chose to live close to a river may be at risk

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6
Q

what is vulnerability

A

how susceptible a population to the damage

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7
Q

what factors increase the risk from a natural hazards

A

in poor parts of the world poverty may force people to live in risky areas

when a river floods it deposits fertile sits on its floodplain

over 50 percent of the worlds population now live in city’s

in a warmer world the atmosphere will have more energy leading yo more intense storms

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8
Q

what is the structure of the earth

A

its made of four layers the inner core, outer core, mantle, crust

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9
Q

what is the inner core

A

the inner core is solid made of iron + nickle it is 1260 km thick and 6000 degrees

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10
Q

what are the characteristics of the outer core

A

2220 k + 4400 degrees

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11
Q

what are the characteristics of the mantle

A

2900 km and 500-900 degrees

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12
Q

what are the characteristics of the crust

A

the crust is 8-56 km thick made of hard rock

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13
Q

what are the two types of crust

A

oceanic and continental

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14
Q

what are the characteristics of the oceanic crust

A

5-10 km
more dense than the continental
subbducts and destroyed when made by continental crust
less than 200 million years old

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15
Q

what are the characteristics of the continental crust

A

20-70 km thick
less dense than the oceanic
cannot be destroyed
up to 3.8 billion years old

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16
Q

what is the plate tectonic theory

A

in 1912 Alfred Wagner proposed the theory of continental drift. he stated that the continental were slowly drifting apart around the earth

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17
Q

how do the continents fit together

A

the continents fit together like a jigsaw to form a super continent called Pangaea. this slowly split up over 250 million into 2 continents Gondwanaland and Laurasia and family’s it is today

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18
Q

how did Alfred Wigner prove his theory of continental drift

A

he did this by tarveling across the world to find similarities in the fossils he found

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19
Q

how is the molten magma heated

A

it is heated by convection currents which occur inside the mantle this is caused by the rising heat from the core. as the currents move the magma it cools on the crust and drags it causing movement of tectonic plates

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20
Q

what are the names of all of the tectonic plates

A

north american
south american
pacific plate
Nazca plate
African plate
Eurasian plate
indo Australian plate

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21
Q

what is an earthquake

A

a sudden or violent movement within the earth crust

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22
Q

what is a plate margin

A

the border between tectonic plates

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23
Q

where are earthquakes and volcanoes usually distributed

A

they are found on plate margins specifically the right hand side of the Eurasian going down the indo Australian

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24
Q

what is the moment magnitude scale

A

The Moment Magnitude Scale measures the amount of energy released by an earthquake event. It is calculated using a formula that includes the rigidity of the rock affected, the distance moved and the size of the area where movement takes place.it is measured on a scale from 1-8 being a bad earthquake

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25
what is the size difference of rated 5 to a rated 7
its 100x larger it times by 10 after each number
26
what is a convergent boundary
this is where continental plates are moving towards each other. They are both of a similar density so no plate is subducted The two plates collide and the crust of both plates becomes crumpled and uplifted causing mountain and earthquakes and example of this is the Himalayas
27
what is a conservative plate margin
this is two plates moving past each other one plate could be moving faster than the other or in a different direction. friction is built up due to friction and it is released causing large earthquakes an example is the pacific and american plate this causes earthquakes
28
what is a constructive palate margin
this is where plates are moving apart due to convection currents magma rises up and creates new land a ridge is formed by the cooling magma volcanoes are created along the ridge from rising magma an example in the mid Atlantic ridge formed from the Eurasian plate earthquakes and volcanoes are made
29
what is a destructive plate margin
plates are moving towards each other oceanic plate in denser so it sub-ducts under the continental plate. The plate melts as it pushed into the mantle. The magma rises back towards the surface of the continental plate. Nazca plate sub ducting plate under south american Andes mountain earthquakes and volcanoes are made
30
what is a primary effect
things that happen immediately as a result of an earthquake
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what is a secondary effect
things that happen as a result of the primary earthquake often in hours days weeks after
32
what is an example of primary effects
buildings falling roads breaking landslide people dying
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what is an example of a secondary effect
loss of electricity emergency response rebuilding
34
what is a short term response
this is a response which happens quickly like emergency services
35
what is a long term response
an example of a long term response is people setting up shelters
36
where is Chile located
Chile is located in south america west of Argentina in the south pacific ocean. It is located on a destructive plate margin ( Nazca and south american)
37
what is the GDP of Chile
24,500
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what were the primary effects of the 2010 Chile earthquake
47 were dead power line down emergency services were sent immediately tsunami warnings buildings shook for 10-30s 8.8 on ricter scale schools and ports were destroyed cost 30 billion pounds
39
What are the secondary effects of the 2010 Chile earthquake
large after shocks fire in chemical plants 1500 km of damaged roads by landslides
40
what were the immediate responses of the 2010 earthquakes
emergency services international help power and water restored to 90%
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what were the long term responses of the 2010 Chile earthquake
government launch a housing reconstruction president announced it could take 4 years for Chile to recover
42
where is Nepal located
Nepal is located in South Asia and shares territorial borders with India and China with an area of 147,181 square kilometers and a population of approximately 30 million.. 7.9 rating on the Richter scale
43
what were the primary effect of the Nepal earthquake in 2015
houses falling down shallow earthquake cracks in the road buildings destroyed
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what were the secondary effects of the Nepal earthquake 2015
avalanches 250 people were killed injury found dead bodies
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what were the short term responses of the Nepal earthquake of 2015
Over 100 search and rescue responders emergency services air ambulances Turkish came and help
46
what are the long term responses of the 2015 earthquake
the army's brought supplies India and China provided over $1 billion of international aid.
47
how do you live in hazardous areas
by building resistant buildings by monitoring volcanoes/ natural hazards teach people about natural hazards however volcanoes come with fertile land ensure there are warning systems
48
How do you reduce the risk of tectonic hazards
by using a seismometer, remote sensing
49
what is a seismometer
it is an instrument that responds to ground motion such as those caused by earthquakes volcanic eruptions and explosions
50
what is remote sensing
scientific analysis of the earths surface using satellite imagery
51
what is the greenhouse effect
The retention of heat in the atmosphere caused by the build-up of greenhouse gases.
52
what is climate change
this is the name given to the decade long increase in global temperature since the 1940s
53
what is the evidence for climate change over the years
moutain glaicers are melting sea ice cover is deacreasing low lying islands are being taken over by sea global sea levels increasing volume due to increasing melting ice caps the timing of seasonal activities such as flowering and bird immigration is changing weather pattern are changing
54
what is global warming
global warming is the name given to the decade long increase i global temperature
55
what are natural causes of climate change
orbital change solar activity's volcanic activity eruption of mount tambora
56
what is orbital change
there are two types of orbital change eccentricity=deviation of a curve or orbit from circularity. changes from circula to eliptical this matches the patterns of the galcias Axial tilt= this is where the angle between the planet's rotational axis and its orbital axis 24.5 to 21.5 degrees what is precession= this is a complete wobble cycle it takes about 26000 years this makes days longer in certain areas
57
what solar activity causes natural climate change
having high sunspot activity can cause results in the release of methane and carbon dioxide from stores in the oceans and icecaps, and these greenhouse gases can then produce additional warming.
58
how do volcanoes effect climate change
the idea when a volcano erupts the temperature will drop
59
who is mulutin milankovitch
he was a Serbian geophysicist he studied the earth orbit identify three cycles that he believed affected the earths climate
60
what was the erruption of mount tambora
the erruption in 1815 was the largest erruption in th world for over 1600 years the ash and sulfuric acid caused the average temperature to drop by 0.4 degrres celcius and 1816 became the year without a summer
61
what are the effects of climate on refugees
100000 of peole are being/ will displace due to sea levels extreme weather less safe drinking water storm surges wildfires
62
what are the environmental effects of climate change
sea levels rises droughts greater storms dead animals increase temperature wild fires ice melting loosing 3x amount of ice 3-6 degrees hotter
63
what percentage does co2 make up green house gasses
60%
64
what is distribution
where on the earths surface tropical storms occur
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what is frequency
how often tropical storms occur
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what is intensity
how powerful a tropical storm is
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what are the methods of monitoring
hydrology= measuring gas levels in water remote sensing= satellites detect heat changes sesmicity= seismographs record earthquake ground deformation= changes in volcano shape geophysical measurement= detect changes in gravity
68
what is a risk assessment
A qualitative or quantitative approach to determine the nature and extent of disaster risk by analyzing potential hazards and evaluating existing conditions of exposure and vulnerability that together could harm people, property, services, livelihoods and the environment on which they depend.
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how do we manage man made contributions to climate change
by using renewable energy electric transport/community transport co2 reduction by planting more trees and carbon capture
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what is carbon capture
Carbon capture and storage is a process in which a relatively pure stream of carbon dioxide from industrial sources is separated, treated and transported to a long-term storage location. For example, the carbon dioxide stream that is to be captured can result from burning fossil fuels or biomass
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what is mitigation
reduce or eliminate the long term risk
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what is adaptation
actions taken to adjust to natural events
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how can climate change be managed
alternative energy souses of energy change in agricultural systems carbon capture managing water supply's planting trees reducing risk from rising sea levels international agreements
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what are the examples of international agreements
2015 pairs agreement 195 countries 2005 Kyoto protocol 170 countries
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what are some renewable energy sources
hydro solar wind
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what are some examples of mitigation
carbon capture alternative energy sources planting trees international agreements
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what are some example of adaptation
change in agricultural systems managing water supply reducing risk from rising sea levels
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how will climate change effect distribution of tropical storms
it will increase the distribution as the climate increase will lead to a larger movement of storms from the north to the south
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how will climate change effect infrequence of tropical storm
the number of hurricane since 1860 in the north Atlantic six of the ten most active and happened in the mid 1900s so it has increased
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how will climate change effect the intensity of a tropical storm
hurricane intensity in the north Atlantic has risen in the last 20 years. This appears to be linked in sea surface temperatures
81
what is the GNI of the Philippines
3,340 despite having larger population
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what is the HDI of the Philippines
0.67 (115th)
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where is the Philippines located
it is located in south east Asia north of the equator. It is surrounded by the pacific ocean and is east of the Indian ocean
84
what were the key dates during typhoon Haiyan
2nd November 2013= typhoon start in the pacific 3rd November 2013= it moves west turn to depression 4th November 2013 = haiyan becomes tropical 5th November 2013= rapid intensification winds up to 175 mph 7th November 2013 = made landfall on the Philippines 10-11th= reaches Vietnam and intensity decreases
85
what were the primary effects of typhoon haiyan
6300 people killed/ drowned 40000 houses destroyed 90% of taco-ban destroyed
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what ere the secondary effects of typhoon haiyan
flooding caused landslides shortages of food and water looting broke out in taco ban
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what were the immediate responses of typhoon haiyan
Tacloban Airport was operational again within 3 days for emergency flights. 1200 evacuation center were set up UK sent shelter kits 12000 us troops
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what were the long term responses of typhoon haiyan
homes have been rebuilt away from dangerous areas cash for work programs set up rice and fish farming re established
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what is a storm surge
where masses of water were pushed by the wind
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why are richer countries more safe when under a tropical storm
they have greater funding for protection and for emergency supplies if anything bad happens
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how do you reduce the effect of tropical storms
by monitoring/ predicting for tropical storms by increasing protection = with reinforced windows, sea walls, storm drains to take away flood water roof that collect water and get rid of it safely planning= raise awareness, prepare individuals, create individual family plans preparation tips= survival kit, emergency plan, how to use the kit
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what is the NHC ( natural hazards)
national hurricane center
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what is the UK weather roundabout
this is where several different masses of weather are coming from different directions we gwt storms from the south west and we get Atlantic ether from the north west and winter weather from the east
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what is the GNI of the UK
£42040
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what is the HDI of the UK
0.907 ranked 14th
96
what were the key points In the Somerset floods
lots of rainfall high tides storm surges river had not been dredged for 20 years bad water flow west January since 1910
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what were the social impacts of the UK somerset flood of 2014
protests houses completely flooded valuables lost over 600 houses folded 16 farm evacuated temporary housing was needed
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what were the economic impacts of the somerset floods
farms destroyed 10 million in flood damages over 14000 acres of land under water railways shut
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what were the environmental impacts of the 2014 somerset floods
farms destroyed heavily contaminated floodwaters with sewage and oil large amounts of debris water had to be pumped back into rivers
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what were the immediate responses to the somerset 2014
emergency water pumps 70 pumps as flood waters spread out home owners cut off floods used boats and volunteers weer used to help others
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what were the long term responses to the somerset floods of 2014
8 km of river were dredged to increase river capacity road levels have been increased communities now with flood defenses tidal barrage at bridgwater
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where is somerset located
south west England in an area of low lying land
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Can extreme weather events be blamed on climate change
no single extreme weather event can be blamed on climate change but scientists do believe that this trend could be linked to a warming world
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why might extreme weather event be increasing
an increase in global temperature atmospheric circulation more energy in the atmosphere
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what proof is there that there has been a change in the usuall weather overvtime in the uk
2003= heatwave 38.5 2007-2009= floods 2009-2010= heavy snow -18.7 2013/14= floods wettest winter 2015-2016 floods wettest and warmest months 2019 hottest December 18.7 2020 storm Bella from north Atlantic 2022 heatwave 40.3
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how are long periods of weather made
the jet stream could become stuck causing long periods of the same weather type such as heatwaves
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What is solar insulation
a measure of energy on a certain area
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how is isolation concentrated
its concentrated over a smaller surface area
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the earth is curved which means what when talking about heating
its harder to heat as it has a larger surface area and the sun like to heat smaller areas
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what are the names of each circulation cell
polar, ferrel, hadley
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what degrees are the polar cells located
90 degrees north and 90 degrees south
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what degrees are the ferele cells located
30 degrees north and 30 degrees south
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what degree are the hadley cell located
o degrees
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how does the polar cell work
the cold air travelling south from the poles meet the warm air travelling north
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how does the ferrel cell work
this cell works a s a result of the other two cells like a gear warm air rising in the polar cells drag warm air in the ferrel and hadley
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how does the hadley celll work
air at the equator rises cools and forms clouds which create rain air also beings to sink and create high pressure
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what are key things to remember about atmospheric circulation
warm air rises and contains moisture when the warm air rises into the atmosphere it cools so it condenses and forms clouds cold air sinks and is dry sinking air creates areas of high pressure at the surface of the earth at the earth surface air moves from areas of high pressure to areas of low pressure
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HIGH IS DRY
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what is the process of a tropical storm being made
a strong movement of air draws water vapor up fro the warm ocean surface the evaporated air cools as it rises and condenses from towering thunderstorm clouds as the air condenses it releases heat which powers the storm and draws up more water several smaller thunder clouds join together to form a giant spinning storm. when a surface winds reach average of 120km per hour the storm officially becomes tropical the storm now develops an eye as its center where air descends rapidly. The outer edge of they eye is the eye wall where most of the intense weather conditions are as the storm is carried across by winds it strengthens on reaching land the storms energy supply is cut off friction of the land slows it down and it begin to weaken.
120
what temperature does the ocean surface temp have to e for a tropical storm
27 degrees
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how are tropical storms measured
using the saffir Simpson scale
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what is the worst a tropical storm can be on a saffir simpson scale
5
123
what is a natural hazard
these are events which are perceived to be a threat to people the built enviroment and the natural enviroment. Natural events often end in disaster
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what is a geophysical hazard
caused by earths proceses. They can be caused by interbal earth processes of tectonic activity or by external processes of geomorphical orignin involving most movemnt
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what is a hydrological hazard
this is caused by the occurence movement and distribution of surface and underground water this is driven by water bodies
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what is an atmospheric hazard
processes operaiting in the atmosphere resultinng in extreme weather or atmospheric conditions
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what are charcteristics of a natural hazard
clear origin of causes distinctive effect little or no warning exposure may be involuntary
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What is a natural disaster
this is where a natural hazard interacts with a vulnaerable populaition
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what is the natural dissatster modle called
this is dreggs modle
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what is a risk
This is the exposure of people to a hazardous event. Presenting a potential threat to themselves, their possesions and the built enviroment in which they live in
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why might people choose to live in an area of risk
due to fertile soil cheaper place for peopleto live to gather reasearch they are unsure of the risk they are at the peoples family have always lived there there is a changing levle risk in the area they live in
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What is the definition of vulnerability
This means that the potential for loss. Some people are more vulnerable than others. This is determind by underlying state of human development. Including ineqaulitys in income oppotunity and political power
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Why is the inner core still hot
The primordial heat left over from the earths formaition and radiogenic heat produced by radio active decay. 4.6bn years ago
134
why do we have gravitaitional feilds
This is because the outter core of the earth moves around the inner core therefore creating a gravitaitional feild
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what percentage of the earths volume is the mantle
84% of the earth is the mantle
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what are the two layers of the crust called
the lithosphere is the crust is the rigged upper section The ansenosphere is the beneath layer of the crust
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what are the 4 types of plate boundaries
destructive constructive conservative collision
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what is risk perception
Risk perception refers to people's beliefs, attitudes, judgments, and feelings toward risk,
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what is hazard perceptions
This is the way in which someone understands or interprets a hazard. People tend to respond to hazards depending on their understanding
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what is the equation for risk
frequency or magnitude x vulnerability x capacity to cope
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What is fatalism
Accepting the hazards are a natural event that we can have little control over and losses have to be accepted
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what is prediction
This perception suggests that hazards are predictable and that they ca be better understood by scientific research. Better technology, comunicaition and warning can be given to reuce these risks
143
what was the evidence for continental drift
jigsaw pattern of continents glacial rock deposists glacial straitions rock sequences fossil branchipods were found in different areas fossil remains
144
what is ridge push
At constructive boundaries the uppwelling of material creates a buyancy effort that produces the ocean ridge whuch stands 2-3 km above the ocean floor. Here the plates experience a force which is a result of gravity acting down the slope of the ridge this causes small earthquakes
145
what is slab pull
At destructive plate margins the force is the pull down of the cold dense subduting plate as it sinks into the mantle. This gravity generated force pulls the slab down
146
what are the most developed continental drift theories
This occurs at constructive plate margins where palates pull away from each other allowing magama/lava to push into the created gap. Iron particles in the lava aligne with magnetic feilds it the solidifies. However every 400,000 yeasr polarity changes at regular intervals. This is mirrored on each side.
147
what are convection currents
Convection currents this causes molten rock deep within the mantle to rise. The magma cools siks and is heated forced to rise this is called a convection cell. Crust is getting destroyed in some places
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what is oceanic crust
basalt and grabbo
149
what is continenetal crust
granite more complex, silicone,aluminium and oxygen
150
what are the pros of the park model
How qaulity of life is impacted by hazardous event. How a range of movement startegies can be used over time from before and after the event the importance of roles of emergency relife agencies and rehab different areas affected may have been different response curves, depending on the levee of preparedness
151
whata re the cons of the park model
It is ciritisiesed for not acounting different levles of economic development or including other isses Th model dress not consider that a hazard event can have differeing effects across a country
152
what would an individuals reponse be in the case of a natural hazard
staying with family or friends ensuring they know the plan incase of emergency helping at charities/search and rescue
153
what would local comunites responses be to a natural hazard
Ensuring that their is a paln and the people in their comunity known what the paln is Evacuation warnings would be sent
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how would National governments respond to a natural disaster
warning systems buiding protection like surge walls evacuation warnings
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what are internatinal agencies doing in a response
sending aid in the from of food etc providing transport
156
What is the hazard management cycle
This cycle illustrates the ongoing process by which governements,businesses and society plan for and recuce the imapct of disasters , reactr during and imediatly after the event
157
how do gas emissions occur
as magma rises into the magma chambers gases escape for the depressurising magma
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what does gas emissions indicate
If its qaulity in escaping volcanic gas increases this can signal the start of an erruptive sequence
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how does ground deformaition occur
The ground swells as the lava rises. This is due to the movement of magma within the lithosphere
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what does ground deformaition indicate
The swelling of the volcano signals that magma has collected near the surface. To find this out they measure the tilit of the volcano
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how does thermal monitoring happen
Both magma movements. changes in gas releases and hydrothermal activity can lead to thermal emmisivity changes at the volcanos surface
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what can thermal monitoring indicate
this is shown by gas relases
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how are satellite images and remote sensing happening
remote sending is the use of satellites to detect things about the earth surface
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what does remote sensing and staellites help indicate
This is usefull as it helps if there is any thermal activity occuring such as swelling
166
how does mass moevment and failures show volcanic activity
Monitoring mass moevments such as mud slide s and pyroclastic flows These can be monitored to show evidence of past activity and to suggest if upwelling magma is deforming the land above.
167
how doe we measure seismic activity
this is a better way to bet long term predictions scientists can use sisemic waves to show if a volcano is getting ready to errupt
168
how does seismic activity indicate an erruption
many volcanos an increasing intensity in frequecy and sixe of earthquakes
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how do we calculate ground water changes
manually using a dipper or automatically by pressure transaucer
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how does ground water changes indicate volcanic activity
volcanic activity genrally causes crustal deformaition
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what are the primary effets of a volcanic erruption
pyroclastic flows volcanic gas lava flows tephra
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what are the features of a pyroclastic flow
very hot 800c gas and tephra mixture destroyed pompeii up to 500 mph
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what are the features of volcanic gas
carbon dioxide, carbon monoxide, hydrogen, sulfur dioxide and chlorine are affected
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whata are the key features of volcanic lava
stream of molten rock distance can varry depending on viscosity
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what are the key features of tephra
soldi material of different sizes big and small volcanic ash can spread thousands of miles from the volcanic source
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what are the secondary effects of a volcano
lahars acid rain tsunamis landslides flooding climate change
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what are the key features of lahars
melted snow and ice combined with volcanic ash liquid when it moves but it sets solid
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How is acid rain made
volcano emits gases which include sulphur when combined with atmospherci moisture
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what is a landslide
large mass of rock and soil whcih falls or slides flow down the volcano under the force of gravity
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how can ash impact cliamte change
cliamte change is impacted when ash is put up into the atmosphere this can reduce global temperatures by blocking uv 1816 the year without summer is an example
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where is the Eyjafjallajokull volcano located
it is located in iceland inbetween the northamerican plate and the eurasian plate.
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what does Eyjaljallajokull stand for
Eyja= island jjalla= mountain jokull=glacier
183
what type of volcano is the Eyjafjallajokull
it is a stratavolcaano (a composite)
184
what are the tectonics of Ejafjalljaokull
on a constructive plate margin baslaltic lava stratavolcano ridge push bisected by the north atlantic ridge This is diverging 2.3 meters each year
185
what were the impact of the Eyjafjallajokull erruption
flights across the world were cancelled due to ash being sent 9km into the atmosphere flooding=Heat from the erruption melted part of the galceir which caused mass flooding There was distruption to flooding= as to protect animals they had to go inside there was a decline in air qaulity lahards due to mud and meltwater mixing together 2.8 million tonnes of carbon was emiited into the atmosphere europe lost 2.6 billion gdp due to the erruption
186
what landforms are found at constructive plate margins
along ocean ridges and rift valleys
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what happens at a destructive plate margin
where a plate subdcts below the other
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what happens at hotspost/ magma plumes
A mantle plume is an area under the rocky outer layer of Earth, called the crust, where magma is hotter than surrounding magma.
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what scale are volcanos measured on
Volcanic explosivity index
190
what number does the Volcanic explosivity index go up to
1-8 1 being not very explosive and 8 being very explosive
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what are the main types of lava you can find at volacanos
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what are the key features of Basaltic Andesite Lava
Silica content: This lava has a moderate silica content, generally between 52-57%. Viscosity: More viscous than basalt, which means it flows slower and can contribute to more explosive eruptions. Eruption style: Although basaltic andesite can produce lava flows, it also traps gases more easily, which can cause explosive activity, as seen in Eyjafjallajökull's eruptions. this can be found at destructive plate margins
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when was the indian ocean tsunami
it wa on december 26 2004
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how did the indian ocean tsunami come about
an earthquake of magnitude 9.1 displaced the ocean floor off the Indonesian island of Sumatra.
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what are some of the key effects the indian ocean tsunami caused
there was a death toll of over 230,000 people across all of the countries it affected 70% of coastline infastructure was completley destoryed it left 1.7million homeless and 600,000 people in aceh lost their livelehoods cholera and malria merged after the earthquake
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what were the long and short term responses to the indian ocean tsunami
search and rescue operations the us deployed 12600 personel as a part of their unified assistance thailand helped by setting up foresnic operations to help identify the bodies by 2009 they had spent 7 billion just in indonesian infastructure they built an indian ocean warning suctent whihc cost 125 million
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when was the mt erapi erruption in indonesia
it was in 2010
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where is mt merapi located
it is a volcanic mountain located near the center of the island near the center of the island of java in inodnesia
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what were the techtonica of the volcano
it is located on the euraisian and indo austrailian plate margin whihc is a destructive plate margin. It is a stratavolcano
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what were the impact of the mt merapi erruption
over 350 people were killed including mbah mardijan who was the traditiona gardian of the volcano nearly 400,000 people were displaced because of the volacano pyroclastic flow caused several villages to be destroyed tourism massivly reduced which had a large econmoic impact
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what were the short and long term responses to the mt merapi erruption
there was mass evacuation of over 350,000 residents ho were within the volcanos danger zone emergency help centers were built in school and military builings goveremnet began to rubild the destroyed infastructure which costed in rhe relams of 450 million pounds
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Where is eyjafjallajokull located
It is located in Iceland
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When did eyjafjallajokull erupt
The spring of 2010
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What are the tectonic features of eyjafjallajokull
It is on a construction plate margin It is a shield volcano It is ridge push which is diverging 2.3 Mm per year
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What were the impacts of Ejafjallajokull
Flights across the world were cancelled as ash was out 9km into the atmosphere which had a huge economic impact There was flooding in the area due the melting of the glacier which was above the volcano 2.8 million tonnes of carbon was emitted
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What were the responses to the eyjafjallajokull eruption
Evacuation of 800 people Airspace was closed There are no improve regulations and instructions for air travel if this is to happen again where 9 airspace blocks will replace 27
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What is the location of hati
Located between the Caribbean Sea and the North Atlantic Ocean
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What are the tectonics of hati
Hati is located on the North American and carbiean plate on a divergent plate boundary 7.0
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What were the impacts of the hati earthquake
Casualties were estimated 250,000 1.5millon were left homeless Cholera outbreak which killed 10,000 1 million people displaced Infrastructure was destroyed
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What were the responses to the hati earthquake
Financial aid was provided which summed up to 13 billion pounds Termporaray camps were made for those who were displaced Us military sent 20,000 troops to help
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Where is Christchurch located
New Zealand South Island in Canterbury
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What were the tectonics of the Christchurch's earthquake
Conservative plate margin Indo Australian and pacific plate margin Magnitude 6.3
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What were the tectonics of the Christchurch eruption
Conservative plate margin Indo Australian and pacific plate margin Magnitude 6.3
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What were the impacts of the earthquake in christchurch
115 casualties Ground liquification occurred causing buildings and stuff to sink People develop ptsd Population decline in the area
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What were the responses to the Christchurch earthquake
Search and rescue operations International assistance from Australia and Japan’s Australia sent 300 personnel Medical support were overwhelmed The government prioritized restoring essential services like water, sewage, and roads. Roads and houses were cleared of silt from liquefaction by August,
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what is tephra
tephra are large peiece of rocks edjected from the volcano
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What is the benioff zone
This is where the oceanic plate beigns to melt 100k below the surface and it comepletly destroyed 700km called the benioff zone f
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what are features of rhylotic lava
destructive plate margins is where it is found cooler lava high viscosity high gas content high silica content an exmaple of where it can be found is at yellowstone
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what is the distribution of tropical storms
tropical storms are formed along the tropics 23.5 degrees north and south of the equator.
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what direction do tropical storms tend to move
west ward
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what conditions do tropical storms form in
low pressure areas with wet coditions
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what sea temperature does it need to be to form a tropical storm
27 degrees
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what scale are tropical storms measured on
the Saffir Simpson scale
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is the saffir simpson scale logarithmic
yes it is roughly logarithmic
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what are the category wind sped for Saffir Simpson scale
Saffir-Simpson Hurricane Wind Scale Category 1. Wind (mph): 74 - 95. Damage: Minimal - No significant structural damage, can uproot trees and cause some flooding in coastal areas. Category 2. Wind (mph): 96 - 110. ... Category 3. Wind (mph): 111 - 129. ... Category 4. Wind (mph): 130-156. ... Category 5. Wind (mph): greater than 156.
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how does climate change affect tropical storms
frequency is remaining the same or will slightly decrease however the intensity will increase intensity will increase due increasing sea temp distribution will increase due to sea
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what are some primary hazards of tropical storms
high winds heavy rainfall strom surge
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what is a case study where there were very high winds
hurricane irma 2017 hurricane flooding due to heavy rain category 4 hurricane developed on the 30th august near cape Verde islands seismometer noticed the storm 130mph winds
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what is a case study where there was very heavy rainfall
hurricane Harley 1000mm rain fall over eastern Texas the emergency services were struggling
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what is the biggest storm surge case study
Hurricane Katrina late august 2005 storm surge of 20-30 feet levees broke leading to more significant damage category 3 earthquake
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what was the locaition/path of hurricane mathew
first it hit hati moved past cuba and the bahamas then hit coastal areas of florida, georga, south carolina and north carolina
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what were the key facst of hurricane matthew
hit hati from the 3rd-5th of october the gdp per capita in hati is 730 compares with 39,500 in florida life expectancy in Florida is 15 years older literacy is 31% more
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what were the primary impacts of hurricane matthew in the US
it caused 49 deaths in the us over 2 million people were evacuated catastrophic inland flooding caused an estimated 10 billion in damages 2.5 million people lost there power infrastructure damage
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what were the secondary impacts of hurricane matthew on the US
Lots of small business affected in various areas a significant number of insurance claims were filled leading to financial strain soil and water pollution flooding in wildlife
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what were the primary imapcts of hurricane matthew
over 546 people were confirmed dead through some estimates place the death tall much higher 175,000 people were displaced nearly 200,000 homes were damaged/destroyed southern Hati agriculture sector was nearly obliterated fishing boats and equipment were destroyed river overflowed and strom surges inducted
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what ere the secondary impacts to hurricane Matthew on hati
resurgence of cholera which they have been battling since 2010 their was destruction of crops causing people to loose there live hoods Hati economy was already struggling and this made it worse they became dependant on aid from other coutries
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what are the conditions which encourage wildfires
dry conditions strong winds prevailing winds Hot temperatures wind strengths A.N others populations of the area vegetations- eucalyptus produces a flammable resin climates
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what are the positive effects of wildfires
fires clear vegetations and aid seed germination it can stimulate the growth of certain plants can rid an area paricites some species are pyrophytic (withstand fire)
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what is a wildfire
a wildfire is an uncontrolled fire which breaks out in a natural environment
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what are the different types of wildfires
surface= most commnen burn along the forrest floor crown= spreads across tree canopies ground= burns beneath ground layers of dry organic pete ladder effect = describes the process of fires from the forrest floor
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what is the distribution of wildfires
wildfire are distributed in countries mainly australia, USA, canada, southern europe, central africa however they can be found anywhere
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what are the three parts of a fire triangle
heat, fuel, oxygen
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what are the different cause of wild fires
climate lightning and by humans eg arson and accidents
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what was the distribution of the australian wildfries of 2019/2020
the distribution of the wildfires was across the whole of australia with the least being in new south wales
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what wre the key facts about the australian wildfires in 2019/2020
kiled 34 people burned 186,000 sqaured km destroyed over 5900 buildings killed an estimated one billion animals caused extinction
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what were the impacts of wildfires in australia
killed 34 people caused people to flee to the sea to escape the fire military planes were being deployed to provide aims to comunities destroyed over 5900 buildings 18.6 million hectares of burnt land 3 billion animals killed or displaced 900 million tonnes of co2 pollution 445 premature deaths
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what are airdrops and how were they effective and disadvantages
air drops were short term water/ sand get is dropped onto wildfires howevere they need to be aware with of the wind this was effective howevere expensive
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what are wildland fire engines and what are there advantages and disadvantages
water and foam and chamilcals are used 3000 liters of water four wheel drive
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what are smoke jumpers
they are firefighters they parachute directly into the wildfire with axes and small amounts of faire
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what are control lines
these are used to reduce the amount of fuel avaliable for the fire by cutting stuff down both long and shirt term
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what is backfiring
backfiring used by burning areas of land ahead of the fire and use up the fuel this reduce the fuel for the fire howevere killed wildlife
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what are evacuations
clearing people from areas of danger this is short term removes people from the danger kills wildlife as we arent evacuaiting wildlife
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Removing dead leaves and branches from the fire
voulnteer groups help to remove dead branches to reduce fuel long term project
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what is gis
these are geographical imformaition systems help map areas of danger
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when was the kobe earthquake
it happened in january 1995
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what are the basic facts of the kobe earthquake
it was the first major strike in kobe in 400 years kobe has a populaition of 1.5 million economic damage was 100 billion which is 2.5 % of japans gdp 6000 people killed 35,000 injured 1/4 million homeless only 3% of buildings were ensured a typhoone hit 6 months after the earthquake making hard for the city to recover train line collapsed struck before rush hour
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what was the risk and vulnerability of kobe earthquake
this city was vulnerable due to the plate boundaries it was on a convergent plate boundary on the eaurasian, pacific and philippine sea due to subduction fault lines are made which can act as a plate margin aswell kobe is a major port it was a shallow earthquake it was at risk of soil liquifaction because f sea
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what were the responses to the kobe earthquake
70% of water siurces were gone making it hard to fight 35 differnt fires highly critised for their response due to them being sent out 5 hour after the event and only 200 were sent out further 4 more days took until june for public services reintroduce they declined international help hard to find jobs in kobe as business didnt reopen 48,000 housing units were supplied for homeless
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where is the philippines
the philippines is an archipeligo of 7100 islands. it is located in southern eastern asia between south china sea and pacific ocean. the two largest islands are luzon and mindanao
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what is the capital of the philippines
it is manila. manila is a multi cultural capital with a populaition of 1.7 million
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what is the official language of the philippines
Filipino is the official language of Manila however due to the growing number of foreign habitants they are slowly becoming fluent in English, Korean and Chinese.
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why are there freqeut earthquakes i the philippines
The philipines is surrounded by numerous differnt plate margins and subduction zones. these different plate margins all affect the philipines due to the seismic and volcanic hazards that thye can cause. The philipines has slowly be created by the converging and diverging plate margins
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why are there so many earthquakes which c=are not caused by plate margins
in the philippines there are numerous fault lines which can ofetn act like plate margins. Fault lines are where there has been a crack in the tectonic plate these can create earthquakes because of the elastic strain it generates
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What is an example of an earthquake which has occured in the philippines
Bohol earthquake isa an earthquake which occured in 2013 in a place call bohol province whihc is in central visays =. This earthquake was cuased by the now named fault line the north bohol fault. This fault line was undiscovered until this earthquake therfor making ther location of the earthquake a suprise. This earthquake caused over 200 deaths and significant damage to infastructure surrounding the area. very shallow earthquake magnitude of 7.2 73,000 structures damaged/ destroyed
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how do the philippines remain prepared for earthquakes through several different measures
They have numerous building codes that are set by the national building code of the philippines to ensure that structures are safe. They are designed to promote the use of sesmic technology
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WHat are th facts of volcanos in the philippines
In the philippines there are around 300 volcanos 24 of which are still active there are so many volcao due to the countrys locaition along the pacfic ring of fire
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What are the facts about mount pinatumbo
This erruption occured in zambales luzon in 1991 this erruption is known as one of that largest volcanic erruptions of the 20th century. This ejected 10 billion tons of magma and ash and 15 million tons of sulfur dioxide casuing global cooling. This erruption caused a caldera o be formed and it displace thousnads of residents. This has led to widespred leahars for years due to heavy rains mixing with ash deposits. this erruption l;ed to 800 deaths
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what is typhoon bopha an exmaple of
Typhoon bopah wasa catagory 5 typhoon that made landfall in midanao a reigon less acustomed to strong typhoons. wind speeds reahced 175 mph accopanyoing high rains and floods. This caused 1067 deaths and left over 800 poeple missiong and displaced 6 million. destoyed tens of thounsands of buillindgs aswell as farms. this typhoon troggered the government to imporve warning sytemsn
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how are the philippines prepared for natural hazards
the philippines have many ways in whch the remain prepared for natural hazrds for exmaple they do comunoty training and regular drills where they will go to shelterstherfor increasig awenrss of these earthquakes. they have also devloped typhoon resisnt builidngs
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how do they respond to natural hazards
in the philippines they have a few rapid response mechanisms for exmaple they have deployment of resources and personnel during disasters vid the national disaster risk reduction and manaement plan
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what are the key features of sndesite lava
Andesite magma commonly erupts from stratovolcanoes as thick lava flows, some reaching several km in length. Andesite magma can also generate strong explosive eruptions to form pyroclastic flows and surges and enormous eruption columns. Andesites erupt at temperatures between 900 and 1100 °
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what are magma plumes
a magam plumes is a collum of hot buyoant magma that rises from deep within the earths mantle towards the surface. These plumes create hotspots leading to volcanic activity far away from plate boundaries. a good example of this is hawaii and Yellowstne
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how are magama plumes formed
magma plumes originate deep in the earths mantle due to heat and buoyancy differences. this is done by the mantle heating, thermal expansion occuring, plume formaition, then melting near the surface and finally volcanic activity
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what is thermal expansion
hotter mantel is heated by the earths core creating temperatire difference
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thermal expansion
hotter material expands becoming less dense and starts rising
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what is the asthenosphere
this is the upper section of the mantle
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what is the lithosphere
the lithosphere is the crust and upper mantle which form the tectonic plates
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what is gravitational sliding
elevated altitudes of oceanic crust at ridges at divergent plate boundaries create a slope which oceanic plates slide down
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what is holmes hypothesis
holmes 1930s said that the earth inetranal radioactive heat was a driving force of convection currents in the mantle which could ove tectonic plates
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what is seafloor spreading
in the 1960s there was a discovery that there are magnectic strips in the sea bed palaeomagnetic signals from ast revearslas of the earths magnetic feild prove that the new crust by a process of seafloor spreading at mid ocean ridges
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what is the name of the building in taiwan with the huge mass damper to reduce bu8lding strain
Taipei 101
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: What is the Park Model and what are its stages?
A graph showing quality of life before, during, and after a hazard. Stages: Pre-disaster → Disruption → Relief → Rehabilitation → Reconstruction.
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What are strengths and weaknesses of the Park Model?
Compares recovery over time; shows long-term impact.
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What are the stages of the Hazard Management Cycle?
Mitigation → Preparedness → Response → Recovery. It shows how we plan for, respond to, and recover from hazards.
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hat are positives and negatives of the Hazard Management Cycle?
Encourages planning and ongoing improvement. ❌ Doesn’t show cost/time clearly; assumes all areas can act equally.
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What are the key features of basaltic lava
Low silica, very runny, high temp, gentle eruptions. Found at shield volcanoes and constructive margins.
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What are the key features of andesitic lava?
Medium silica and thickness, more explosive, found at destructive plate boundaries. Can produce pyroclastic flows.
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What are the key features of rhyolitic lava?
igh silica, thick and sticky, low temp, very explosive. Linked to supervolcanoes like Yellowstone