Alaska earthquakes

M3.5 earthquake 44 km W of Adak, Alaska

A magnitude 3.5 earthquake struck 44 km W of Adak, Alaska on Thu, Apr 2, 2020, 2:41 PM HADT (23:41 UTC), 101 km (63 mi) below the surface.

A larger quake followed: M3.8 97 km SW of Adak, Alaska. This one was a foreshock.

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Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude: 3.5 (ml), minor
Local time: Thu, Apr 2, 2020, 2:41 PM HADT
UTC: 2020-04-02 23:41:01 UTC
Depth: 101.2 km (62.9 mi), intermediate-depth
Epicenter: 51.823° N, 177.280° 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 10.0 km horizontally, 3.1 km in depth
Magnitude uncertainty: ±0.10
Depth from: From location
Station coverage gap: 105°
Stations used: 26

Nearby

Within 100 km, magnitude 1.5 and up: at least 199 in the 60 days after this one and 132 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 us700091id (also filed as ak0204a6x1cj). Read Wed, Sep 30, 2026, 5:15 AM UTC.