M1.8 earthquake 74 km E of Nikolski, Alaska

A magnitude 1.8 earthquake struck 74 km E of Nikolski, Alaska on Sat, Dec 18, 2021, 12:45 AM AKST (09:45 UTC), 40 km (25 mi) below the surface.

A larger quake followed: M6.8 100 km SE of Nikolski, 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: at least 200 in the 60 days after this one and 29 in the 30 days before it.

The first 60 of at least 200.

From the USGS Earthquake Hazards Program and its partner networks, event ak021g6ass03. Read Fri, Oct 2, 2026, 7:14 PM UTC.