Alaska earthquakes

M2.8 earthquake 69 km ENE of Adak, Alaska

A magnitude 2.8 earthquake struck 69 km ENE of Adak, Alaska on Wed, Apr 28, 2021, 12:02 AM HADT (09:02 UTC), 82 km (51 mi) below the surface.

A larger quake followed: M3.8 56 km NE of Adak, Alaska. This one was a foreshock.

Map

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The earthquake

Magnitude: 2.8 (ml), micro
Local time: Wed, Apr 28, 2021, 12:02 AM HADT
UTC: 2021-04-28 09:02:00 UTC
Depth: 81.9 km (50.9 mi), intermediate-depth
Epicenter: 52.047° N, 175.656° 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 11.9 km horizontally, 5.1 km in depth
Magnitude uncertainty: ±0.13
Depth from: From location
Station coverage gap: 169°
Stations used: 25

Nearby

Within 100 km, magnitude 1.5 and up: 30 in the 60 days after this one and 82 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 us7000dyae (also filed as av91025383, ak0215fas6zt). Read Sat, Sep 26, 2026, 1:41 AM UTC.