Living In An Active Zone Flashcards
Short term effects to reduce volcanic eruptions
- earth barriers
- spraying Lava with water
- dropping concrete blocks via helicopter
- Ariel bombing lava with dynamite
- Diverting lava into old vents
How are volcanoes monitored
- Tiltmeter
- Seismometer
- Spectrometer
- Thernometer
Why do people continue to live in hazardous zones
- tourism
- geothermal energy - cheap renewable energy
- soils - volcanic ash and rock weathers to produce fertile soil as it attracts farmers
- there will be more tourism in the area
How might the effects of a volcano be reduced
-preparing-
Exclusion zones, evacuation e.g Mt St. Helens
-predicting-
Long term hazard mapping reduces the impact of a volcano by limiting the access or controlling development
How can you prepare for an earthquake?
- earthquake drills
- earthquake survival kits
- earthquake proof buildings, roads and bridges
Primary hazards of earthquake
The ground shaking
Slight movement
Secondary hazards of an earthquake
- landslides
- liquefaction
- avalanches
- tsunamis
- aftershocks
Secondary hazards of an earthquake
CASE STUDY - SICHUAN, CHINA
An earthquake on the 7.9 richer scale
Primary hazards of a volcano
- lave, ash, gas
- lava bombs
- pyroclastic flow
Secondary hazards of a volcano
Lahars
Secondary hazards of an volcano
CASE STUDY - WASHINGTON DC
In 1980 Mt St Helens erupted
Where are narrow belts created
Margins or plate boundaries
Destructive plate margins are when the plates are moving ….
Together
Constructive plate margins are when the plates are moving ….
Apart
Volcanoes and earthquakes occur together in what
Narrow belts
