Alaska earthquakes

M3.1 earthquake 59 km S of Adak, Alaska

A magnitude 3.1 earthquake struck 59 km S of Adak, Alaska on Fri, Feb 7, 2020, 4:36 AM HAST (14:36 UTC), 35 km (22 mi) below the surface.

A larger quake followed: M4.7 133 km SW of Adak, Alaska. This one was a foreshock.

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The earthquake

Magnitude: 3.1 (ml), minor
Local time: Fri, Feb 7, 2020, 4:36 AM HAST
UTC: 2020-02-07 14:36:27 UTC
Depth: 35.0 km (21.7 mi), shallow
Epicenter: 51.346° N, 176.780° 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 3.6 km horizontally, 2.0 km in depth
Magnitude uncertainty: ±0.13
Depth from: Operator assigned
Station coverage gap: 212°, poorly surrounded by stations
Stations used: 30

Nearby

Within 100 km, magnitude 1.5 and up: at least 199 in the 60 days after this one and at least 200 in the 30 days before it.

After

The first 60 of at least 199.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us70007s31 (also filed as ak0201r2z17i). Read Thu, Oct 1, 2026, 12:40 AM UTC.