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In seismology, a tsunami earthquake is an earthquake which triggers a tsunami of significantly greater magnitude, as measured by shorter-period seismic waves. The term was introduced by Japanese seismologist Hiroo Kanamori in 1972. [1] Such events are a result of relatively slow rupture velocities. They are particularly dangerous as a large ...
As early as 426 BC the Greek historian Thucydides inquired in his book History of the Peloponnesian War about the causes of tsunami, and was the first to argue that ocean earthquakes must be the cause. [12] [13] The oldest human record of a tsunami dates back to 479 BC, in the Greek colony of Potidaea, thought to be triggered by an earthquake.
236 children were orphaned in the prefectures of Iwate, Miyagi and Fukushima by the disaster; 1,580 children lost either one or both parents, 846 in Miyagi, 572 in Iwate, and 162 in Fukushima. The quake and tsunami killed 378 elementary, middle-school, and high school students and left 158 others missing.
Only about 12 hours after the initial eruption, tsunami waves a few feet. On Jan. 15, 2022, coastal areas across California were placed under a tsunami warning. Gado via Getty ImagesOn Jan. 15 ...
Diagram of the 1958 Lituya Bay megatsunami, which proved the existence of megatsunamis. A megatsunami is a very large wave created by a large, sudden displacement of material into a body of water. Megatsunamis have different features from ordinary tsunamis. Ordinary tsunamis are caused by underwater tectonic activity (movement of the earth's ...
The Tsunami portal. A tsunami ( / ( t) suːˈnɑːmi, ( t) sʊˈ -/ (t)soo-NAH-mee, (t)suu-; from Japanese: 津波, lit. 'harbour wave', pronounced [tsɯnami]) is a series of waves in a water body caused by the displacement of a large volume of water, generally in an ocean or a large lake. Earthquakes, volcanic eruptions and other underwater ...
A meteotsunami or meteorological tsunami[ 1] is a tsunami -like sea wave of meteorological origin. Meteotsunamis are generated when rapid changes in barometric pressure cause the displacement of a body of water. In contrast to impulse-type tsunami sources, a traveling atmospheric disturbance normally interacts with the ocean over a limited ...
The geological record of the region indicates on average, these mega earthquake and tsunami events happen every 500 years. This part of the US is at highest risk for a devastating tsunami Skip to ...