Hazardous Earth SG5 Flashcards
(40 cards)
What are three reasons we are now more at risk from tectonic hazards?
Urbanisation (high population and building density), Increasing global population, Climate change
What are three reasons we are now less at risk from tectonic hazards?
Aseismic design, Education/preparedness, Improved technology (communication and monitoring)
Define Hazard
A natural event with the POTENTIAL to threaten life and property
Define Disaster
A natural event which DOES impact a population
What certain numbers need to be reached for a natural event to be called a disaster?
10 deaths and 100 people affected
What is the Disaster Risk equation?
Risk = Hazard x Vulnerability/Capacity to Cope
Define Risk
The likelihood that humans will be seriously affected by a hazardous event
Define Vulnerability
How susceptible a population is to the damage caused by a hazard
Define Capacity to Cope
The ability of people, organisations and systems (using available skills and resources) to manage risk or disasters
Define Resilience
The ability too ‘spring back’ from the impacts of a hazard
What does capacity to cope require?
Continuing awareness, Resources and Good management, both in normal times as well as during disasters
What are three socio-economic factors which influence a population’s degree of vulnerability to tectonic hazards?
Building design and quality, Level of development, Insurance
What are three physical factors which influence a population’s degree of vulnerability to tectonic hazards?
Type of hazard, Frequency, Location of epicentre
What are three political factors which influence a population’s degree of vulnerability to tectonic hazards?
Stability of the government, Government strategies to protect population, Government spending
What fraction of the world’s population will be urban by 2050?
2/3
What does the World Risk Index consider?
A number of factors which affect the level of risk to disasters
What are the four categories of the World Risk Index?
Exposure, Susceptibility, Coping capacity, Adaptive capacity
True or False: The number of recorded geophysical disasters has increased over the last 50 years
True
True of False: Deaths caused by tectonic hazards has fallen in recent decades
False
True or False: The total number of people affected by geophysical disasters has increased in recent years
True
True or False: The economic impact of tectonic hazards has tended to decrease through time
False
Why are none of the top 5 tectonic disasters volcanic eruptions?
Earthquakes can be more unpredictable, Earthquakes impact larger amounts of people due to there being lower population densities around volcanoes
What are five reasons data about disasters can be unreliable?
Differences in opinions over whether secondary deaths count, Difficult to collect statistics, Location bias, Political bias, Difficulty interpreting historical data
Define Hazard Management Cycle
How we respond to tectonic events can determine how large and how long lasting the disaster is