Alaska earthquakes

M3.1 earthquake 271 km SE of Chiniak, Alaska

A magnitude 3.1 earthquake struck 271 km SE of Chiniak, Alaska on Fri, Jul 16, 2021, 11:23 PM AKDT (07:23 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M3.2 292 km SE of Chiniak, 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: 3.1 (ml), minor
Local time: Fri, Jul 16, 2021, 11:23 PM AKDT
UTC: 2021-07-17 07:23:47 UTC
Depth: 10.0 km (6.2 mi), shallow
Epicenter: 56.266° N, 148.566° 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.

Location uncertainty: About 2.6 km horizontally, 2.0 km in depth
Magnitude uncertainty: ±0.05
Depth from: Operator assigned
Station coverage gap: 191°, poorly surrounded by stations
Stations used: 47

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 38 in the 60 days after this one and 18 in the 30 days before it.

After

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000emul (also filed as ak02193kpsr2). Read Thu, Sep 24, 2026, 3:29 AM UTC.