Alaska earthquakes

M2.7 earthquake 68 km SW of Adak, Alaska

A magnitude 2.7 earthquake struck 68 km SW of Adak, Alaska on Mon, May 18, 2020, 8:20 PM HADT (05:20 UTC), 41 km (26 mi) below the surface.

A larger quake followed: M5.2 52 km WNW of Adak, Alaska. This one was a foreshock.

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The earthquake

Magnitude: 2.7 (ml), micro
Local time: Mon, May 18, 2020, 8:20 PM HADT
UTC: 2020-05-19 05:20:34 UTC
Depth: 41.4 km (25.7 mi), shallow
Epicenter: 51.390° N, 177.241° 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 3.9 km horizontally, 18.9 km in depth
Magnitude uncertainty: ±0.13
Depth from: From location
Station coverage gap: 215°, poorly surrounded by stations
Stations used: 28

Nearby

Within 100 km, magnitude 1.5 and up: at least 200 in the 60 days after this one and 140 in the 30 days before it.

After

The first 60 of at least 200.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000a0su (also filed as ak0206fmc46f). Read Tue, Sep 29, 2026, 5:17 PM UTC.