GEOL 104 Lecture Notes - Lecture 27: Paleoseismology, Regolith, Fault Scarp
18 Apr 2016
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Generated from movement along subduction material: sudden displacement of water. Wave height grows (water piles up) as approaches shore: earthquake caused tsunamis. Offshore earthquakes can cause tsunamis to go toward land and out to sea. Uplifted dome of water splits in two waves. Travel out to sea and can travel long distances with little loss of energy. Most devastating: less time to lose energy, japan tsunami. Affecting japan and na west coast: can earthquakes be predicted. To provide warning of location and magnitude within narrow time frame. Research concentrated on monitoring possible precursors: tsunami warning system. Observations in pacific ocean allow scientists to track tsunamis and issue appropriate warning. Series of deep-water buoys in pacific ocean detect energy released by earthquakes. Tidal gauges measure sea level rise and fall. Can track and see how long until it hits different locations: lituya bay, alaska, 1958. One of largest tsunamis ever visually confirmed.
