M5.1 Earthquake — 208 km ESE of Attu Station, Alaska

Measurements

Measured by

Earthquake data courtesy of the U.S. Geological Survey

This is a scientific measurement of an event that has already happened. It is not a warning, and it does not tell you what to do.

Not rated by source. US Geological Survey does not publish a severity for this; the level shown is our own classification.

This event as JSON · API and licence

Source updated 56 days ago (Aug 23, 2026 23:32 UTC) · we last heard from US Geological Survey 45 seconds ago

What USGS has published since this earthquake

Reports of the shaking

USGS received 1 "Did You Feel It?" report; the strongest shaking reported was intensity III (weak).

How far the shaking reached

• Strong shaking (intensity VI) or more reached about 20 km from the epicentre at its farthest.
• Moderate shaking (intensity V) or more reached about 30 km from the epicentre at its farthest.
• Light shaking (intensity IV) or more reached about 55 km from the epicentre at its farthest.

USGS ShakeMap, automatic: an estimate built from seismic stations, felt reports and a model where there are neither. Distances are in a straight line from USGS's epicentre; the lines on the map above are USGS's contours, simplified. Shaking varies with the ground, so a place inside a line may have felt less or more.

From the U.S. Geological Survey. The USGS event page has the maps and everything USGS has published for this earthquake.

General safety information

No authority has issued instructions for this event. The guidance below is general background reading, not a response to it.

Drop, Cover, and Hold On — what to do before, during and after an earthquake, plus emergency kit and family plan checklists.