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

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11 Terms

1
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where are volcanoes found (2)
plate margins, hotspots
2
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where are lots of volcanoes concentrated
pacific ring of fire
3
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where do narrow belts of earthquakes form
constructive and conservative plate boundaries
4
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where do wide belts of earthquakes form
destructive plate boundaries
5
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what can form as a result of volcanic eruptions (2)
islands, continents
6
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where do the most fatal landslides tend to form (2)
tectonically active regions, areas with high precipitation
7
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what is the general trend between frequency and magnitude
as frequency increases, magnitude decreases
8
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how does the richter scale work
an increase of 1 means an earthquake that is 100x stronger
9
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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
10
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what does the volcanic explosivity index measure
the amount of material ejected, the height of the eruption, the damage caused
11
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what is a level 5 VEI eruption considered
very large and violent