Alaska earthquakes

M3.4 earthquake 275 km SE of Perryville, Alaska

A magnitude 3.4 earthquake struck 275 km SE of Perryville, Alaska on Fri, Oct 15, 2021, 11:36 PM AKDT (07:36 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M3.8 213 km SE of Perryville, Alaska. This one was a foreshock.

Map

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The earthquake

Magnitude: 3.4 (ml), minor
Local time: Fri, Oct 15, 2021, 11:36 PM AKDT
UTC: 2021-10-16 07:36:57 UTC
Depth: 10.0 km (6.2 mi), shallow
Epicenter: 54.161° N, 156.106° 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 7.8 km horizontally, 2.0 km in depth
Magnitude uncertainty: ±0.08
Depth from: Operator assigned
Station coverage gap: 222°, poorly surrounded by stations
Stations used: 94

Nearby

Within 100 km, magnitude 1.5 and up: 11 in the 60 days after this one and 10 in the 30 days before it.

After

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000fvb9 (also filed as ak021da2pap4). Read Wed, Sep 23, 2026, 4:17 AM UTC.