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The term "tsunami" is a borrowing from the Japanese tsunami 津波, meaning "harbour wave."For the plural, one can either follow ordinary English practice and add an s, or use an invariable plural as in the Japanese. [14]
Analysis of tsunami earthquakes such as the 1946 Aleutian Islands earthquake shows that the release of seismic moment takes place at an unusually long period. Calculations of the effective moment derived from surface waves show a rapid increase with decrease in the frequency of the seismic waves, whereas for ordinary earthquakes it remains almost constant with frequency.
The 2004 Indian Ocean tsunami at Ao Nang, Krabi Province, Thailand. A tsunami (/(t) s uː ˈ n ɑː m i, (t) s ʊ ˈ-/ (t)soo-NAH-mee, (t)suu-; from Japanese: 津波, lit. 'harbour wave', pronounced) 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.
The wave caught the Japanese off guard, not knowing its origin, and was explained in the book, The Orphan Tsunami. [82] 1707: Nankai, Japan: 1707 Hōei earthquake: Earthquake: On 28 October 1707, during the Hōei era, an 8.4 magnitude earthquake and tsunami up to 10 metres (33 ft) high [83] hit Tosa Province (Kōchi Prefecture). More than ...
Documentary films about tsunamis, 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 explosions (including detonations, landslides, glacier calvings , meteorite impacts and other disturbances) above or below water ...
A tsunami is a series of large water waves caused by the displacement of a large volume within a body of water, often caused by earthquakes, or similar events. This may occur in lakes as well as oceans, presenting threats to both fishermen and shoreside inhabitants.
A 3-metre (9.8 ft) tsunami caused moderate damage to the port and airport facilities on Simeulue, and a 2-metre (6.6 ft) tsunami was recorded on the west coast of Nias. [21] Much smaller waves, most detectable only in tide gauge recording systems, were recorded across the Indian Ocean; for example, a 0.21m wave was recorded at Colombo , Sri Lanka .
Each DART station consists of a surface buoy and a seafloor bottom pressure recording (BPR) package that detects water pressure changes caused by tsunamis.The surface buoy receives transmitted information from the BPR via an acoustic link and then transmits data to a satellite, which retransmits the data to ground stations for immediate dissemination to NOAA's Tsunami Warning Centers, NOAA's ...