M1.7 earthquake 83 km WSW of Unalaska, Alaska

A magnitude 1.7 earthquake struck 83 km WSW of Unalaska, Alaska on Thu, Dec 23, 2021, 7:25 AM AKST (16:25 UTC), 7 km (4 mi) below the surface.

A larger quake followed: M3.2 18 km W of Dutch Harbor, 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 ak021geojabn. Read Thu, Sep 24, 2026, 9:27 AM UTC.