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The first tsunami wave surged up the Tagus estuary about an hour after the earthquake, reached a maximum runup of 12 meters (40 feet), and killed another 1000 people. At least two more tsunami waves surged into the city, completing the earthquake's destruction. At Portugal's coastal city of Lagos the tsunami was even larger, perhaps 30 m (100 ft).
The wave came out of the lower part, and looked like the smallest part of the whole thing. The wave did not go up 1,800 feet, the water splashed there. [11] The wave made its way to his boat 2–3 minutes after he saw it and carried the Edrie down to the southern shore and then back near the center of the bay. Ulrich was able to control the ...
The areas hardest hit were the northern coastal areas and outlying islands like Penang and Langkawi.Wave heights near the shore were 2.5–3 m (8.2–9.8 ft) for Langkawi and 2–3 m (6.6–9.8 ft) for Penang, where wave runup heights were 6–8 m (20–26 ft) in one location.
A megatsunami is a tsunami with an initial wave amplitude measured in many tens or hundreds of metres.The term "megatsunami" has been defined by media and has no precise definition, although it is commonly taken to refer to tsunamis over 100 metres (330 ft) high. [2]
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Though a warning of a possible tsunami of 3 m (9.8 ft) in height was issued, [40] a 60 cm (24 in) wave was reported by NHK in the port of Onahama of Iwaki, Fukushima; a 90 cm (35 in) wave hit Sōma, Fukushima; and another wave 1 m (3 ft 3 in) in height struck the Fukushima Daiichi Nuclear Power Plant site after the 6.9 shock. [41]
[2] [3] One of the very few cases where evidence suggests a freak wave incident is the 1978 loss of the freighter MS München. This claim, however, is contradicted by other sources, which maintain that, over a time period from 1969 to 1994 alone, rogue waves were responsible for the complete loss of 22 supertankers, often with their entire crew.
Out of an estimated total of 15,000 fatalities, around 5,000 are thought to have been killed by the landslide, around 5,000 by the tsunami across the bay in Higo Province, and a further 5,000 by the tsunami returning to strike Shimabara. The initial wave once reached a height of 330 ft (100 m), classing this tsunami as a megatsunami. At the ...