Alaska earthquakes

M2.9 earthquake 201 km WSW of Adak, Alaska

A magnitude 2.9 earthquake struck 201 km WSW of Adak, Alaska on Tue, Sep 22, 2020, 12:11 AM HADT (09:11 UTC), 74 km (46 mi) below the surface.

A larger quake followed: M4.8 193 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, Sep 22, 2020, 12:11 AM HADT
UTC: 2020-09-22 09:11:38 UTC
Depth: 73.7 km (45.8 mi), intermediate-depth
Epicenter: 51.520° N, 179.496° 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 4.2 km horizontally, 6.2 km in depth
Magnitude uncertainty: ±0.12
Depth from: From location
Station coverage gap: 174°
Stations used: 21

Nearby

Within 100 km, magnitude 1.5 and up: 135 in the 60 days after this one and 89 in the 30 days before it.

After

The first 60 of 135.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000c6bx (also filed as ak020c82dnn8). Read Mon, Sep 28, 2026, 12:55 AM UTC.