Alaska earthquakes

M2.7 earthquake 107 km SSE of Atka, Alaska

A magnitude 2.7 earthquake struck 107 km SSE of Atka, Alaska on Sat, Jul 18, 2020, 10:45 PM HADT (07:45 UTC), 35 km (22 mi) below the surface.

A larger quake followed: M3.9 30 km ESE of Atka, 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: 2.7 (ml), micro
Local time: Sat, Jul 18, 2020, 10:45 PM HADT
UTC: 2020-07-19 07:45:31 UTC
Depth: 35.0 km (21.7 mi), shallow
Epicenter: 51.266° N, 173.796° 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 7.6 km horizontally, 2.0 km in depth
Magnitude uncertainty: ±0.12
Depth from: Operator assigned
Station coverage gap: 282°, poorly surrounded by stations
Stations used: 32

Nearby

Within 100 km, magnitude 1.5 and up: 66 in the 60 days after this one and 44 in the 30 days before it.

After

The first 60 of 66.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000b38t (also filed as ak02098jgiou). Read Tue, Sep 29, 2026, 12:34 PM UTC.