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13 Cards in this Set
- Front
- Back
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offshore earthquake that shifted sea floor , the highest wave 29m in narrow inlets killing 27,000. Where and when was it?
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Japan, 1896
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What can sea floor movement be caused by?
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earthquakes,Landslides, submarine volcanic eruptions, meteorite impact
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Tsunami are most often created by whast kind of movement?
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earthquakes
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Explain the type of earthquake that most often causes tsunamis?
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usually vertical fault motions at subduction zones, mostly in the pacific
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Wind waves
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single wave is entire mass, velocity depends on period of wave, 17mph for 5 sec wave :70mph for 20 sec wave
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What does a tsunami look like at the shoreline?
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a very rapidly rising tide, rushing inland, each occurrence separated by 10 to 60 min
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Wind blown wave comes into the beach how?
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waves rotates in circles
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Earthquake tsunami formation
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can cause tsunami wave to be hundreds of miles long and can reach heights of 34ft. The waves travel as fast as a commercial jet.
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Most powerful earthquake caused tsunami was what magnitude?
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9.5 subduction event in chile
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Where is the most killer tsunami generated?
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subduction zones
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flank collapses
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where the whole side of an oceanic volcano breaks off and falls into the sea. at leaste 70 in hawaiian islands in past 20 million years. These cover over 5 times the area the islands
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The next volcano induced tsunami will possibly be at?
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on the active volcano Kilauea on the southside of the big Island of Hawaii. Area of moving masses includes 80km or 50mi long of coastal area.
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Canary island in the Atlantic ocean
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3 of them have had mega-collapses, last one 15,000 years ago, next mega collapse could send powerful tsunami to coasteline of africa, europe
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