Alaska earthquakes

M3.6 earthquake 20 km E of Adak, Alaska

A magnitude 3.6 earthquake struck 20 km E of Adak, Alaska on Sun, May 3, 2020, 8:14 PM HADT (05:14 UTC), 79 km (49 mi) below the surface.

A larger quake followed: M4.0 100 km SW 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 (mb), minor
Local time: Sun, May 3, 2020, 8:14 PM HADT
UTC: 2020-05-04 05:14:04 UTC
Depth: 79.1 km (49.2 mi), intermediate-depth
Epicenter: 51.869° N, 176.344° 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 6.2 km horizontally, 4.6 km in depth
Magnitude uncertainty: ±0.16
Depth from: From location
Station coverage gap: 176°
Stations used: 42

Nearby

Within 100 km, magnitude 1.5 and up: 193 in the 60 days after this one and 86 in the 30 days before it.

After

The first 60 of 193.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us70009ce3 (also filed as ak0205qt8k6j). Read Tue, Sep 29, 2026, 5:36 PM UTC.