Lecture 5

Lecture 5 - Right after an earthquake, build new road,...

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What is an earthquake? or Hypocenter Dip Angle Fault Trace
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Strike and Dip
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Strike of San Andreas Fault Strike = ~280 degrees N
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Dip of reverse fault Dip =~60 degrees
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Fault Trace Emerson Fault, ruptured in 1992 Landers M7.3 earthquake
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Fault Trace from 1999 M7.1 Hector Mine earthquake
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Fault Trace from 1999 M7.1 Hector Mine earthquake
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Fault trace from 1979 M6.4 Imperial Valley earthquake
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Fault scarp from 1959 M7.5 Hebgen Lake earthquake ~6 m
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Fault scarp from 1959 M7.5 Hebgen Lake earthquake
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Fault scarp from 1959 M7.5 Hebgen Lake earthquake
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Fault scarp from 1983 M7.3 Borah Peak earthquake
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Fault scarp from 1999 M7.1 Hector Mine earthquake
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Unformatted text preview: Right after an earthquake, build new road, replant straight crop rows Right before the next earthquake, road and crop rows are bent because friction along the fault zone keeps the earth from moving. This bending is similar to pushing or pulling on a spring -- it is storing elastic energy. In the earthquake, the fault zone breaks, releasing the elastic energy stored.The road and crops rows are no longer bent, but they are offset at the fault zone. Elastic Rebound Theory Seismic Waves Body waves P and S waves P- vs S- Wave...
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This note was uploaded on 01/11/2010 for the course GEOL 240Lxg at USC.

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Lecture 5 - Right after an earthquake, build new road,...

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