Alaska earthquakes

M2.6 earthquake 79 km WSW of Adak, Alaska

A magnitude 2.6 earthquake struck 79 km WSW of Adak, Alaska on Sat, Sep 19, 2020, 1:49 AM HADT (10:49 UTC), 77 km (48 mi) below the surface.

A larger quake followed: M4.8 135 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: 2.6 (ml), micro
Local time: Sat, Sep 19, 2020, 1:49 AM HADT
UTC: 2020-09-19 10:49:48 UTC
Depth: 76.5 km (47.6 mi), intermediate-depth
Epicenter: 51.708° N, 177.754° 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 8.6 km horizontally, 5.1 km in depth
Magnitude uncertainty: ±0.12
Depth from: From location
Station coverage gap: 177°
Stations used: 58

Nearby

Within 100 km, magnitude 1.5 and up: 135 in the 60 days after this one and 100 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 us6000c58v (also filed as ak020c34l7q1). Read Sun, Sep 27, 2026, 11:08 PM UTC.