Alaska earthquakes

M2.8 earthquake 32 km ESE of Atka, Alaska

A magnitude 2.8 earthquake struck 32 km ESE of Atka, Alaska on Sun, Apr 5, 2020, 6:34 AM HADT (15:34 UTC), 189 km (118 mi) below the surface.

A larger quake followed: M4.5 93 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: 2.8 (ml), micro
Local time: Sun, Apr 5, 2020, 6:34 AM HADT
UTC: 2020-04-05 15:34:41 UTC
Depth: 189.2 km (117.5 mi), intermediate-depth
Epicenter: 52.138° N, 173.740° 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 33.2 km horizontally, 11.8 km in depth
Magnitude uncertainty: ±0.15
Depth from: From location
Station coverage gap: 304°, poorly surrounded by stations
Stations used: 21

Nearby

Within 100 km, magnitude 1.5 and up: 73 in the 60 days after this one and 28 in the 30 days before it.

After

The first 60 of 73.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us60009evm (also filed as ak0204f0q70y). Read Wed, Sep 30, 2026, 2:46 AM UTC.