Alaska earthquakes

M3.4 earthquake 42 km NNE of Adak, Alaska

A magnitude 3.4 earthquake struck 42 km NNE of Adak, Alaska on Wed, May 27, 2020, 7:03 AM HADT (16:03 UTC), 182 km (113 mi) below the surface.

A larger quake followed: M5.2 52 km WNW of Adak, 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: 3.4 (mb), minor
Local time: Wed, May 27, 2020, 7:03 AM HADT
UTC: 2020-05-27 16:03:14 UTC
Depth: 181.5 km (112.8 mi), intermediate-depth
Epicenter: 52.236° N, 176.438° 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 10.8 km horizontally, 4.4 km in depth
Magnitude uncertainty: ±0.14
Depth from: From location
Station coverage gap: 129°
Stations used: 53

Nearby

Within 100 km, magnitude 1.5 and up: 116 in the 60 days after this one and 57 in the 30 days before it.

After

The first 60 of 116.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000a8u9 (also filed as ak0206t12zms). Read Tue, Sep 29, 2026, 10:43 PM UTC.