TITLE

Q: What causes tsunamis?

AUTHOR(S)
Mogil, H. Michael
PUB. DATE
April 2005
SOURCE
Science & Children;Apr/May2005, Vol. 42 Issue 7, p46
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The article offers information on the causes of tsunamis. Tsunami means "harbor wave" in Japanese, and they have a long history in Japan. Tsunamis are most often caused by undersea earthquakes. An undersea landslide, a volcano, or even a large meteorite can also trigger a tsunami event. The magnitude of the earthquake that triggered the South Asia tsunami in December 2004 was 9.0. According to the United States Geological Survey, it was the fourth largest in the world since 1900. A tsunami is triggered by a megathrust earthquake, an earthquake that occurs at a megathrust fault, the boundary between two tectonic plates where one plate is moving under the other or subducting. A tsunami may dissipate or may travel hundreds or even thousands of kilometers depending upon its characteristics. Sea waves can build to heights of 10m or more.
ACCESSION #
21551605

 

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