GEOL105 Study Guide - Midterm Guide: Types Of Volcanic Eruptions, Thrust Fault, Shallow Focus
5 Nov 2018
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Document Summary
Can be a series of massive waves. Not caused by the sun moon or other gravitational forces. Is caused by a sudden, violent, vertical displacement of matter on the sea floor. Sent massive, rapidly moving slurry of volcanic material into the ocean. Dumped 90 megatons of rock from 3,000 ft above the bay. Created a splash wave that rose 530 meters (1740 ft) Reached hawaii 6 hrs later as 10 cm tall wave. By far the most common cause of tsunami: Major thrust fault earthquake with a shallow focus at a subduction zone. As subducting plate descends, zone of friction creates a locked fault zone between overriding plate and subducting oceanic plate. Stress of continuous subducting motion causes strain. Fault rupture as strain exceeds the force of friction holding the edges of the plates together. Wall of wtaer pushed from the sea floor. Absorbs much of the energy caused by earthquakes. Transmits much of the energy caused by.
