Megatsunami in Alaska’s Tracy Arm was the second-highest ever measured

By: Yereth Rosen

Outlets: Alaska Beacon

Published: May 7, 2026

Words: 1,010

Last Updated: 2 months, 1 week ago

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When a wall of rock collapsed into Southeast Alaska’s Tracy Arm last August, it triggered one of the highest-reaching tsunamis ever recorded in the world. The event happened to be in a place heavily visited by cruise ships.

A study newly published in the journal Science describes its massive magnitude.

The landslide dumped 64 million cubic meters of debris into the water, triggering a megatsunami with an initial …

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