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Tsunamis in the Atlantic – unlikely, but possible

Mihai Andrei by Mihai Andrei
March 20, 2011
in Science
Reading Time: 1 min read
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There’s been a lot of fuss around tsunamis lately, especially seen as Japan, perhaps the most prepared country in the world, was devastated by them. A tsunami in the Atlantic however, is a rare sight, due to the fact that that there are no subduction areas, the most common cause of tsunami-causing earthquakes.

Map of reported tsunamis; credit NOAA

However, even though the tsunami threat in the Atlantic region is quite low, it should definitely be taken into consideration, especially as millions of people live in low elevation areas around the Atlantic basin. The most famous example of a tsunami in the Atlantic took place more than 200 years ago, in 1755, in Lisbon, caused by what is believed to have been a 8.6 magnitude earthquake, generating waves as high as 12 meters and killing approximately 100.000 people; however, an event of this magnitude today would definitely do much more damage as the area is much more populated.

The latest major tsunami causing event took place in 1918, when a 7.3 earthquake struck Puerto Rico and generated tsunamis of 6-7 meters. However, the bad thing is that due to the fact that there is a low risk for those areas, there is little to no preparation made, so unfortunately, a big tsunami in the Atlantic basin would have absolutely devastating effects.

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Tags: atlantictsunamitsunami risktsunami threattsunamis
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Mihai Andrei

Mihai Andrei

Andrei's background is in geophysics, and he's been fascinated by it ever since he was a child. Feeling that there is a gap between scientists and the general audience, he started ZME Science -- and the results are what you see today.

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