The spatial distribution of geophysical hazard events and the relevance of hazard magnitude and frequency/recurrence intervals for risk management, measuring geophysical hazards

where are volcanoes found (2)

where are volcanoes found (2)

plate margins, hotspots

where are lots of volcanoes concentrated

pacific ring of fire

where do narrow belts of earthquakes form

constructive and conservative plate boundaries

where do wide belts of earthquakes form

destructive plate boundaries

what can form as a result of volcanic eruptions (2)

islands, continents

where do the most fatal landslides tend to form (2)

tectonically active regions, areas with high precipitation

what is the general trend between frequency and magnitude

as frequency increases, magnitude decreases

how does the richter scale work

an increase of 1 means an earthquake that is 100x stronger

the richter scale is being replaced by the moment magnitude scale. what is this

an increase of 0.2 represents a doubling of the energy released by the earthquake

what does the volcanic explosivity index measure

the amount of material ejected, the height of the eruption, the damage caused

what is a level 5 VEI eruption considered

very large and violent