M1.7 earthquake 92 km ESE of Ugashik, Alaska

A magnitude 1.7 earthquake struck 92 km ESE of Ugashik, Alaska on Mon, Aug 23, 2021, 9:58 PM AKDT (05:58 UTC), 20 km (12 mi) below the surface.

A larger quake followed: M2.1 119 km SSE of Ugashik, Alaska. This one was a foreshock.

Map

Where this earthquake was located, with the others nearby. Select one for its page.

No one has reported feeling this quake to the USGS.

Reviewed by a seismologist.

Distance and direction from each place to the epicenter, with its forecast.

Within 100 km, magnitude 1.5 and up: 200 in the 60 days after this one and 0 in the 30 days before it.

The first 60 of 200.

From the USGS Earthquake Hazards Program and its partner networks, event ak021aue5mm8. Read Tue, Sep 22, 2026, 9:29 PM UTC.