Tectonics Flashcards
What is a natural hazard
a natural event which can damage people and their property
what is a disaster
the realisation of when a hazard has taken place
what is meant by resilience
the ability of a community to cope with a hazard
why a nation may be vulnerable
-poverty
-lack of preparedness/ education
-lack of awaredness
-ageing population
why some communities have a high capacity to cope
-have emergency evacuations
-react by helping each other to reduce numbers affected
-hazard-resistant design or land-use planning
what does the PAR model suggest
suggests socio-economic context of a hazard is important
disasters are likely to take place due to
-bad governance
-low coping capacity
What is the MMS and what does it measure
moment magnitude scale measures the energy released from an earthquake (how much movement has taken place in the fault)
What is the VEI and what does it measure
Volcanic explosivity index measures magnitude of volcanic eruption
what is meant by the term governance
process by which a country or region is run
geographical factors influencing hazard impacts
-population density- highly dense areas are harder to evacuate
-degree of urbanisation
what is spatial predictability
predicting an area where a hazard will take place but not when
why are volcanoes on convergent plate boundaries larger in magnitude
due to subduction of old oceanic lithosphere back into the mantle
produces more rhyolite lava which has higher silica content
what is a tectonic mega disaster
a disaster which can have regional or global significance in terms of economic and human impacts
