Alaska earthquakes

M2.7 earthquake 36 km SSW of Adak, Alaska

A magnitude 2.7 earthquake struck 36 km SSW of Adak, Alaska on Mon, Apr 27, 2020, 10:48 AM HADT (19:48 UTC), 71 km (44 mi) below the surface.

A larger quake followed: M4.0 117 km S of Adak, Alaska. This one was a foreshock.

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The earthquake

Magnitude: 2.7 (ml), micro
Local time: Mon, Apr 27, 2020, 10:48 AM HADT
UTC: 2020-04-27 19:48:01 UTC
Depth: 71.4 km (44.3 mi), intermediate-depth
Epicenter: 51.552° N, 176.768° 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 10.5 km horizontally, 11.7 km in depth
Magnitude uncertainty: ±0.13
Depth from: From location
Station coverage gap: 214°, poorly surrounded by stations
Stations used: 27

Nearby

Within 100 km, magnitude 1.5 and up: at least 199 in the 60 days after this one and 98 in the 30 days before it.

After

The first 60 of at least 199.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us70009isb (also filed as ak0205fh0hbh). Read Tue, Sep 29, 2026, 6:40 PM UTC.