Alaska earthquakes

M3.1 earthquake 67 km WSW of Adak, Alaska

A magnitude 3.1 earthquake struck 67 km WSW of Adak, Alaska on Mon, Jul 17, 2023, 9:48 PM HADT (06:48 UTC), 71 km (44 mi) below the surface.

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

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The earthquake

Magnitude: 3.1 (ml), minor
Local time: Mon, Jul 17, 2023, 9:48 PM HADT
UTC: 2023-07-18 06:48:27 UTC
Depth: 70.9 km (44.0 mi), intermediate-depth
Epicenter: 51.611° N, 177.514° 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 6.8 km horizontally, 7.9 km in depth
Magnitude uncertainty: ±0.08
Depth from: From location
Station coverage gap: 193°, poorly surrounded by stations
Stations used: 27

Nearby

Within 100 km, magnitude 1.5 and up: at least 201 in the 60 days after this one and 187 in the 30 days before it.

After

The first 60 of at least 201.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000kvpy (also filed as ak023957t0de). Read Wed, Sep 30, 2026, 8:44 PM UTC.