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650-foot mega-tsunami is recorded by satellites, sends seismic waves worldwide for nine days (www.earth.com)

submitted 4 days ago by Icytrees@sh.itjust.works to c/wildfeed@sh.itjust.works

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On September 16, 2023, more than 25 million cubic yards of rock and ice – enough to fill 10,000 Olympic-size pools – broke loose and plunged into Dickson Fjord.

The impact hurled up a mega-tsunami wave, reaching about 650 feet high.

The surge barreled down the two-mile corridor, bounced off the headland, and tore back again, wrecking roughly $200,000 in equipment at an empty research post on Ella Island.

Water did not calm after the first pass. Instead, it began rocking from wall to wall, a motion known as a seiche.

Computer models later showed the surface rising as much as 30 feet, then sinking the same amount in a steady rhythm that pressed on the seafloor like a giant piston.

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[–] onyxjet@lemmy.world 14 points 4 days ago (1 children)

Mm yes nice.. Image

[–] queermunist@lemmy.ml 8 points 4 days ago (1 children)

It's crazy how the tsunami just sprang out of the mountain like that. Usually they come from the ocean!

[–] Icytrees@sh.itjust.works 4 points 4 days ago

Hey, I'm not a tsunami-entist.

[–] rbos@lemmy.ca 5 points 4 days ago

Harrison Lake, in BC, Canada, is supposed to have a landslide of similar magnitude that could let go at any time. Some people think the slosh from that might reach as far as the US border, across several municipalities. A couple hundred thousand people.

So that'll be fun.