Alaska earthquakes

M2.6 earthquake 78 km E of Atka, Alaska

A magnitude 2.6 earthquake struck 78 km E of Atka, Alaska on Mon, May 18, 2020, 10:19 AM HADT (19:19 UTC), 35 km (22 mi) below the surface.

A larger quake followed: M4.1 19 km SSE 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: 2.6 (ml), micro
Local time: Mon, May 18, 2020, 10:19 AM HADT
UTC: 2020-05-18 19:19:43 UTC
Depth: 35.0 km (21.7 mi), shallow
Epicenter: 52.165° N, 173.059° 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 8.2 km horizontally, 2.0 km in depth
Magnitude uncertainty: ±0.15
Depth from: Operator assigned
Station coverage gap: 335°, poorly surrounded by stations
Stations used: 16

Nearby

Within 100 km, magnitude 1.5 and up: 72 in the 60 days after this one and 22 in the 30 days before it.

After

The first 60 of 72.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us70009mn4 (also filed as ak0206e74n45). Read Wed, Sep 30, 2026, 5:50 AM UTC.