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Tsunami is a Javanese word from a seismic sea wave generated by an
undersea earthquake, landslide, or eruption.
Most
tsunamis happen along the ring of fire. It is a zone of volcanoes
and seismic activity. The zone encircles the Pasific Ocean.
Historically, tsunamis have caused much destruction and death. Since 1819, about
40 tsunamis have struck the Hawaian Islands and since 1883, about 20 tsunamis have struck
Indonesia. The last one was on December 26,2004,which caused over 100.000
deaths.
A
tsunami can have a width of 100 to 200 km and may spread far across
the deep ocean. The speed is as fast as a jet plane. When the wave reaches land
it can be very high, about 15 m or more.
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