Alaska earthquakes

M1.9 earthquake 40 km ENE of Port Alsworth, Alaska

A magnitude 1.9 earthquake struck 40 km ENE of Port Alsworth, Alaska on Tue, Dec 21, 2021, 11:38 PM AKST (08:38 UTC), 196 km (122 mi) below the surface.

A larger quake followed: M5.1 48 km NW of Ninilchik, Alaska. This one was a foreshock.

Ninilchik forecast More in Alaska

Map

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

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The earthquake

Magnitude: 1.9 (ML, local (Richter)), micro
Magnitude from: Alaska Earthquake Center
Local time: Tue, Dec 21, 2021, 11:38 PM AKST
UTC: 2021-12-22 08:38:23 UTC
Depth: 196.3 km (122.0 mi), intermediate-depth
Epicenter: 60.329° N, 153.640° W
Region: Alaska
Tsunami flag: No
Status: Reviewed by a seismologist

Did you feel it?

No one has reported feeling this quake to the USGS.

How well it is located

Reviewed by a seismologist.

Stations used: 43

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: at least 202 in the 60 days after this one and at least 200 in the 30 days before it.

After

The first 60 of at least 202.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak021gcwb8fv. Read Fri, Oct 2, 2026, 10:43 PM UTC.