Alaska earthquakes

M3.6 earthquake 135 km SSW of Atka, Alaska

A magnitude 3.6 earthquake struck 135 km SSW of Atka, Alaska on Thu, Feb 13, 2020, 5:39 AM HAST (15:39 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M4.8 117 km SSW of Atka, 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: 3.6 (ml), minor
Local time: Thu, Feb 13, 2020, 5:39 AM HAST
UTC: 2020-02-13 15:39:52 UTC
Depth: 10.0 km (6.2 mi), shallow
Epicenter: 51.085° N, 174.988° 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 4.3 km horizontally, 2.0 km in depth
Magnitude uncertainty: ±0.13
Depth from: Operator assigned
Station coverage gap: 242°, poorly surrounded by stations
Stations used: 21

Nearby

Within 100 km, magnitude 1.5 and up: 91 in the 60 days after this one and 50 in the 30 days before it.

After

The first 60 of 91.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us70007ui4 (also filed as ak020210t947). Read Wed, Sep 30, 2026, 11:17 PM UTC.