earthquakes 10

earthquakes 10 - Earthquake 10 First wave to hit does not...

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Earthquake 10 First wave to hit does not have to be positive. Sea level can draw down, then back up. (Thailand in tsunami). Tsunamis can be triggered by underwater landslides as well as subduction mega-thrust earthquakes. Total Internal Reflection: Critical angle of incidence: Ray cannot propagate to V2, it can’t get out of V1. This is what Love waves are, they get trapped and continue to move back and forth in the “slower” medium. Low velocity layer within two fast velocity layers near surface (lower crust). In general, the seismic wave speed increases with depth (usually due to increasing density with depth). Seismic waves have curved ray paths as they travel through the earth. As it gets denser, more parallel to interface, less dense = more towards the normal. As seismology became a science around the 1950s, people started to use P wave velocity, S wave velocity, and density combined with experiments on rocks to determine the internal structure of the earth. They found: -Earth has a spherically layered structure
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This note was uploaded on 01/23/2009 for the course GEOL 240Lxg taught by Professor 12:30-01:50pm during the Fall '07 term at USC.

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earthquakes 10 - Earthquake 10 First wave to hit does not...

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