Alaska earthquakes

M3.1 earthquake 132 km E of Atka, Alaska

A magnitude 3.1 earthquake struck 132 km E of Atka, Alaska on Mon, Aug 17, 2020, 2:05 AM HADT (11:05 UTC), 99 km (62 mi) below the surface.

A larger quake followed: M3.8 183 km ESE of Atka, Alaska. This one was a foreshock.

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The earthquake

Magnitude
3.1 (ml), minor
Local time
UTC
2020-08-17 11:05:23 UTC
Depth
99.4 km (61.8 mi), intermediate-depth
Epicenter
52.140° N, 172.272° 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 11.3 km horizontally, 27.9 km in depth
Magnitude uncertainty
±0.10
Depth from
From location
Station coverage gap
203°, poorly surrounded by stations
Stations used
27

Nearby

Within 100 km, magnitude 1.5 and up: 31 in the 60 days after this one and 34 in the 30 days before it.

After

Before

Earthquakes todayAlaska earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000bhp3 (also filed as ak020akk6pnq). Read Wed, Sep 30, 2026, 12:01 AM UTC.