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A tsunami surge of 64-centimetre (25 in) hit Norfolk Island and tsunami waves of 30-to-40-centimetre (12 to 16 in) hit New Zealand, [200] while a much larger tsunami of 2.64 m (8.7 ft) in height hit Raoul Island, closest to the epicentre of the earthquake. [201] 2021 Ambon Earthquake-triggered underwater landslide
For example, if the Pacific Ocean is considered to have a depth of 5000 metres, the velocity of a tsunami would be √ 5000 × 10 = √ 50000 ≈ 224 metres per second (730 ft/s), which equates to a speed of about 806 kilometres per hour (501 mph).
On the Korean Peninsula, the tsunami slammed into the east coast, flooding nine villages and destroying many fishing vessels. [12] [13] The tsunami was documented five times in the annals of the Joseon dynasty. [14] Estimation of wave heights along the coast range from 3–4 m (9.8–13.1 ft). [15]
According to Swedish authorities, some 20,000–30,000 citizens were in the tsunami-affected areas at the time, mainly in Thai resorts. 543 persons were reported deceased, and over 1,500 in need of emergency medical help and/or transportation home. 528 bodies had been identified as of May 16, 2006. [19]
The residents of the coastal towns and villages were taken completely by surprise because the tsunami had only been preceded by a relatively weak shock. The magnitude of the tsunami has been estimated as M t =8.2 while the earthquake shaking only indicated a magnitude of M s =7.2. This discrepancy in magnitude requires more than just a slow ...
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.
This subduction zone was responsible for the 2004 Indian Ocean earthquake and tsunami. [15] In parts of the megathrust south of Java, referred to as the Java Trench, for the western part, M w 8.9 is possible, while in the eastern Java segment, M w 8.8 is possible, while if both were to rupture at the same time, the magnitude would be M w 9.1.
A modern example of a landslide into a reservoir lake, overtopping a dam, occurred in Italy with the Vajont Dam disaster in 1963. Evidence exists in paleoseismological observations and other sedimentary core sample proxies of catastrophic rock failures of landslide-triggered lake tsunamis worldwide, including in Lake Geneva during AD 563.