Alaskan Glacier Collapse Unleashes 481-Meter Tsunami in Tracy Arm Fjord
TL;DR Summary
A gradual retreat of the South Sawyer Glacier exposed unstable rock above Alaska’s Tracy Arm Fjord, triggering a sudden rockfall on Aug 10, 2025 that generated a 481-meter tsunami—the second-largest on record and the largest not caused by an earthquake—amplified by the fjord’s narrow geometry and a lingering seiche; scientists warn this climate-linked hazard could rise as more infrastructure enters vulnerable areas.
- A Glacier Held Back a Mountain for Centuries, But When It Collapsed Without Warning, It Created a 481-Meter Tsunami Taller Than the Burj Khalifa The Daily Galaxy
- Megatsunami in Alaska’s Tracy Arm was the second-highest ever measured Alaska Beacon
- A Landslide in Alaska Set Off a Tsunami. There May Be More to Come. The New York Times
- Alaska’s 2025 mega tsunami highlights risk to cruise lines as glaciers retreat The Guardian
- Ride a jet ski through a re-creation of an Alaska mega-tsunami with the help of science CNN
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