110 miles SE of Amchitka, Alaska was recorded by Global Incident Tracker on Friday, 11 September 2026 at 10:49 UTC. The event is classified as a tsunami incident with a severity rating of Severe, and was detected through PTWC.
Tsunami message issued by the US Tsunami Warning System.
Understanding tsunami events
Ocean waves generated by earthquakes, landslides or eruptions. A tsunami is a series of waves, and the first is often not the largest. Where the shaking is strong enough to make standing difficult near a coast, the correct response is immediate movement to high ground without waiting for an official alert.
How severity is rated
Global Incident Tracker rates every event on a four-step scale — Minor, Moderate, Severe and Extreme — derived from the source signal: earthquake magnitude, official GDACS alert colour, or the volume of independent media reporting for news-derived incidents. This event is currently rated Severe. Ratings can change as more information becomes available, and a rating is a monitoring signal rather than an official government assessment.
Safety guidance for tsunami situations
- Keep a safe distance from the affected area and let emergency services work unobstructed.
- Rely on official local channels for instructions and avoid amplifying unverified reports.
- Prepare a basic emergency kit: water, medication, torch, power bank, documents and cash.
- Follow only official instructions from local authorities and emergency services — this page is a monitoring record, not an emergency alert.
Data and verification
This record was generated automatically from PTWC and de-duplicated against our archive. Early reports for any incident can be revised: locations get refined, magnitudes are recalculated and impact figures change as assessments arrive. We deliberately do not publish casualty numbers unless an official source states them. The original source report is linked at the top of this page.
Keep watching the situation on our live world incident map, browse every tsunamis we track on the Tsunami tracker, or see today's global picture on the incidents today page.
Timeline and sources
Official warning
Issued by NOAA Pacific Tsunami Warning Center. A warning or forecast describes a hazard; on its own it is not a report that harm occurred.
How statuses are decided · the number of reports is never treated as confirmation.
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· received · event time 11 Sep 2026, 10:49 UTCFirst report Official warning
First recorded from NOAA Pacific Tsunami Warning Center.
Times are when this site received each report, in UTC; the event time is shown where the source gave one. Copies of one syndicated story count as one report.