Alaska earthquakes

M2.9 earthquake 202 km W of Adak, Alaska

A magnitude 2.9 earthquake struck 202 km W of Adak, Alaska on Tue, Oct 27, 2020, 5:23 PM HADT (02:23 UTC), 107 km (67 mi) below the surface.

A larger quake followed: M4.9 182 km WSW 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: 2.9 (ml), micro
Local time: Tue, Oct 27, 2020, 5:23 PM HADT
UTC: 2020-10-28 02:23:42 UTC
Depth: 107.0 km (66.5 mi), intermediate-depth
Epicenter: 51.707° N, 179.559° 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 7.0 km horizontally, 7.1 km in depth
Magnitude uncertainty: ±0.12
Depth from: From location
Station coverage gap: 138°
Stations used: 24

Nearby

Within 100 km, magnitude 1.5 and up: 67 in the 60 days after this one and 64 in the 30 days before it.

After

The first 60 of 67.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000cdnd (also filed as ak020dvhmp2y). Read Sun, Sep 27, 2026, 3:03 AM UTC.