EPS C20 Lecture Notes - Lecture 5: Aseismic Creep, San Andreas Fault, Carrizo Plain
8 Sep 2016
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Document Summary
Fastest plates are about 10cm a year: speed at which fingernails grow. Eq occur along plate boundaries that have a high speed. Four types of eq faults: normal one part slides down, reverse push towards another upwards, strike-slip two plates slide past each other horizontally, oblique most common (mixed dip-slip and strike-slip) How are faults and plate tectonics connected: divergent normal, convergent reverse, transform strike slip. Can one see faults: san andreas fault in carrizo plain; you can easily see the fault. What happens when you constantly push or pull on a rock. One option: it gets folded or contorted. Another option: it breaks or fractures = earthquake! How does the accumulated stress gets release: aseismic creep. Flanks constantly move, free slipping (like a turtle) Even along creeping faults, the reality is somewhere in between. Creeps relieve strain, makes earthquakes smaller: coseismic slip. Coseismic = goes along with an earthquake. San andreas fault: hayward fault is an in-between.
