Alaska earthquakes

M2.7 earthquake 250 km W of Adak, Alaska

A magnitude 2.7 earthquake struck 250 km W of Adak, Alaska on Sat, Aug 22, 2020, 6:47 AM GMT+12 (18:47 UTC), 186 km (115 mi) below the surface.

A larger quake followed: M4.6 294 km WSW of Adak, 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: 2.7 (ml), micro
Local time: Sat, Aug 22, 2020, 6:47 AM GMT+12
UTC: 2020-08-21 18:47:17 UTC
Depth: 185.7 km (115.4 mi), intermediate-depth
Epicenter: 51.890° N, 179.734° E
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 16.1 km horizontally, 5.6 km in depth
Magnitude uncertainty: ±0.12
Depth from: From location
Station coverage gap: 107°
Stations used: 30

Nearby

Within 100 km, magnitude 1.5 and up: 123 in the 60 days after this one and 59 in the 30 days before it.

After

The first 60 of 123.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000bjcn (also filed as ak020arar4lp). Read Wed, Sep 30, 2026, 11:58 AM UTC.