Alaska earthquakes

M2.1 earthquake 51 km W of Tyonek, Alaska

A magnitude 2.1 earthquake struck 51 km W of Tyonek, Alaska on Mon, May 31, 2021, 12:28 AM AKDT (08:28 UTC), 101 km (63 mi) below the surface.

A larger quake followed: M4.3 25 km W of Salamatof, Alaska. This one was a foreshock.

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

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The earthquake

Magnitude: 2.1 (ml), micro
Local time: Mon, May 31, 2021, 12:28 AM AKDT
UTC: 2021-05-31 08:28:21 UTC
Depth: 101.3 km (62.9 mi), intermediate-depth
Epicenter: 61.160° N, 152.065° W
Region: Alaska
Felt reports: 7
Tsunami flag: No
Status: Reviewed by a seismologist

Did you feel it?

7 people reported to the USGS what they felt; the strongest reported shaking was IV, light shaking.

How well it is located

Reviewed by a seismologist.

Stations used: 87

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 198 in the 60 days after this one and 75 in the 30 days before it.

After

The first 60 of 198.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak0216xv2x1g (also filed as us6000eg7d). Read Tue, Sep 29, 2026, 1:36 PM UTC.