Alaska earthquakes

M2.3 earthquake 10 km SW of Susitna, Alaska

A magnitude 2.3 earthquake struck 10 km SW of Susitna, Alaska on Thu, Aug 12, 2021, 10:15 AM AKDT (18:15 UTC), 63 km (39 mi) below the surface.

A larger quake followed: M3.4 3 km SE of Big Lake, Alaska. This one was a foreshock.

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Map

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

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The earthquake

Magnitude: 2.3 (ml), micro
Local time: Thu, Aug 12, 2021, 10:15 AM AKDT
UTC: 2021-08-12 18:15:18 UTC
Depth: 62.7 km (39.0 mi), shallow
Epicenter: 61.474° N, 150.646° 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: 76

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 197 in the 60 days after this one and 109 in the 30 days before it.

After

The first 60 of 197.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak021aar6sn4 (also filed as us6000f4lx). Read Fri, Sep 25, 2026, 10:28 PM UTC.