tsunami - 9/21/09 Tsunami Tsunami Generation Tsunami:...

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9/21/09 Tsunami Tsunami Generation Tsunami: Japanese name for harbor wave -Highest where focused in bays or harbors Called tidal waves, but not related to tides Generated by any sudden displacement of large volume of water Most commonly generated by earthquakes -Volcanic eruptions, volcano flank (side of volcano) collapses, underwater landslides (has happened in Hawaii), asteroid impacts Earthquake-Generated Tsunami Shallow-focus underwater earthquakes cause sudden rise or fall of seafloor, displacing large volume of water Usually subduction zone (occasionally normal fault) Tsunami waves move in all directions from location where they were generated Height of tsunami wave depends on: Earthquake magnitude- how big the earthquake was- bigger EQ’s move more water Area of rupture zone Rate and volume of water displaced Sense of ocean floor motion Depth of water above rupture -Wave height in open ocean dependent on amount of displacement at source Tsunami Movement Tsunami in open ocean: Small wave heights
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This note was uploaded on 02/21/2010 for the course GEOL 116 taught by Professor Kruger during the Spring '09 term at Binghamton University.

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tsunami - 9/21/09 Tsunami Tsunami Generation Tsunami:...

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