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Seismic waves

Greater the magnitude of earthquake, rarer they are- negative correlation
The point within the crust where pressure release occurs- focus/hypocentre
Closest distance from focus
Seismic waves don't all travel at the same speed. The rock type will effect velocity
Epicentre are worked out by looking at different…

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Mercalli scale

Measures and refers to likely damage
Ground observations
Measured on a scale of 1- 12, 1 being lowest and 12 being highest
1900's first created
Now called modified Mercalli scale (MMI)
Generally higher MMI near epicentre

Richter scale

Measures magnitude (energy released from earthquake)
10x difference…


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