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13 Cards in this Set
- Front
- Back
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seismicity occurs due to |
motion along a newly formed crustal fault. motion on an existing fault |
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quantity of offset occurring along a fault is called |
displacement |
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hypocenter is the |
spot within the earth where earthquake waves originate. below surface |
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epicenter is the |
land surface above the hypocenter |
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in a normal fault the |
hanging wall moves down relative to footwall. results from extension. divergent boundary |
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in reverse faults the |
hanging wall moves up relative to footwall. results from compression (squeezing) convergent boundary. slope of fault is steep |
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what waves pass through earth's interior |
body waves. not interior |
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body waves consist of |
P and S waves as both pass through interior. |
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Primary (P) waves |
push-pull motion, travel through solids, liquids, and gases. fastest |
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Secondary (S) waves |
shaking motion, travel only through solids, not liquids. slow |
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surface waves |
travel along earth surface. Love waves - move like snake Rayleigh waves - move like ripples of pond |
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how do scientists do to find epicenter |
use 3 seismic stations. with the circles |
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what boundaries do quakes occur at |
all three. shallow- divergent and transform. intermediate and deep- convergent |
