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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]
[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, ...
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). Wave heights have been estimated at 3 to 4 metres (9.8 to 13.1 ft) even as far away as the Korean Peninsula. [9]
The tsunami reportedly sunk the islands of Kamo, Nabeshima and Kashiwajima, which were then busy settlements. Oral records suggest these features were solid outcrops rather than sandbars . Kamo Island was located 1 km (0.62 mi) off the coast of Takasu and was 2 km (1.2 mi) long by 0.3 km (0.19 mi) wide.
It resulted in two tsunami waves which destroyed about 9,000 homes and caused at least 22,000 deaths. [4] The waves reached a then-record height of 38.2 metres (125 ft); this would remain the highest on record until waves from the 2011 Tōhoku earthquake exceeded that height by more than 2 metres (6 ft 7 in). [5]
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).