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The tsunami reached a height of 30 metres (98 ft) in Avacha Bay, and elsewhere on the peninsula's coast waves of 6.3 metres (21 ft) and 63 metres (207 ft) were reported and evidence of a run-up height of 70 metres (230 ft) was found on one ridge.
At Sado Island, over 350 kilometres (217 mi; 189 nmi) away, a wave height of 2 to 5 metres (6 ft 7 in to 16 ft 5 in) has been estimated based on descriptions of the damage, while oral records suggest a height of 8 metres (26 ft).
The Lituya Bay megatsunami caused damage at higher elevations than any other tsunami, being powerful enough to push water up the tree covered slopes of the fjord with enough force to clear trees to a reported height of 524 m (1,719 ft). [9] A 1:675 recreation of the tsunami found the wave crest was 150 m (490 ft) tall. [14]
The tsunami at Ryōri Bay (綾里湾), Ōfunato reached a height of 40.1 meters (132 ft) (run-up elevation). Fishing equipment was scattered on the high cliff above the bay. [179] [180] At Tarō, Iwate, the tsunami reached a height of 37.9 meters (124 ft) up the slope of a mountain some 200 meters (660 ft) away from the coastline. [181]
[12] [13] The oldest human record of a tsunami dates back to 479 BC, ... is the "tsunami height" in metres, averaged along the nearest coastline, ...
A diagram of the Dart II System A tsunami buoy Water column height on 11 March 2011 (Tōhoku earthquake and tsunami) at DART buoy 21413, 690 NM Southeast of Tokyo Plot of measurements from DART buoy 34142 showing the passage of the tsunami generated by the 2010 Chile earthquake.
Tsunami waves were noted in over 20 countries, including Peru, New Zealand, Papua New Guinea, Japan, Mexico, and in the continent of Antarctica. The largest tsunami wave was recorded in Shoup Bay , Alaska, with a height of about 220 ft (67 m).
The second and third waves came in 10 minutes intervals after the first wave. The third wave was the strongest, with a maximum tsunami wave height of 11 m (36 ft). Waves nearly three stories high devastated the Indian Air Force base, located just south of Malacca. The maximum tsunami wave height of 11 m (36 ft).