Alaska earthquakes

M2.7 earthquake 103 km ENE of Atka, Alaska

A magnitude 2.7 earthquake struck 103 km ENE of Atka, Alaska on Sun, Jul 26, 2020, 8:31 PM HADT (05:31 UTC), 117 km (72 mi) below the surface.

A larger quake followed: M3.9 30 km ESE of Atka, Alaska. This one was a foreshock.

Map

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The earthquake

Magnitude: 2.7 (ml), micro
Local time: Sun, Jul 26, 2020, 8:31 PM HADT
UTC: 2020-07-27 05:31:51 UTC
Depth: 116.6 km (72.4 mi), intermediate-depth
Epicenter: 52.503° N, 172.761° 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 14.8 km horizontally, 5.5 km in depth
Magnitude uncertainty: ±0.12
Depth from: From location
Station coverage gap: 172°
Stations used: 21

Nearby

Within 100 km, magnitude 1.5 and up: 43 in the 60 days after this one and 25 in the 30 days before it.

After

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000b9rl (also filed as ak0209lqhki9). Read Tue, Sep 29, 2026, 1:04 PM UTC.