Alaska earthquakes

M3.1 earthquake 65 km ENE of Adak, Alaska

A magnitude 3.1 earthquake struck 65 km ENE of Adak, Alaska on Fri, Jul 21, 2023, 10:45 AM HADT (19:45 UTC), 157 km (97 mi) below the surface.

A larger quake followed: M5.0 44 km SSE of Adak, Alaska. This one was a foreshock.

Map

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 21, 2023, 10:45 AM HADT
UTC: 2023-07-21 19:45:21 UTC
Depth: 156.6 km (97.3 mi), intermediate-depth
Epicenter: 52.161° N, 175.802° 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 14.1 km horizontally, 6.3 km in depth
Magnitude uncertainty: ±0.08
Depth from: From location
Station coverage gap: 160°
Stations used: 27

Nearby

Within 100 km, magnitude 1.5 and up: 166 in the 60 days after this one and 85 in the 30 days before it.

After

The first 60 of 166.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000kw92 (also filed as ak0239ae515o). Read Wed, Sep 30, 2026, 11:56 PM UTC.