Alaska earthquakes

M3.1 earthquake 104 km S of Adak, Alaska

A magnitude 3.1 earthquake struck 104 km S of Adak, Alaska on Mon, Nov 16, 2020, 12:58 AM HAST (10:58 UTC), 24 km (15 mi) below the surface.

A larger quake followed: M4.0 45 km SSE of Adak, Alaska. This one was a foreshock.

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The earthquake

Magnitude
3.1 (ml), minor
Local time
UTC
2020-11-16 10:58:18 UTC
Depth
23.5 km (14.6 mi), shallow
Epicenter
50.952° N, 176.351° 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 4.6 km horizontally, 9.5 km in depth
Magnitude uncertainty
±0.13
Depth from
From location
Station coverage gap
264°, poorly surrounded by stations
Stations used
22

Nearby

Within 100 km, magnitude 1.5 and up: 92 in the 60 days after this one and 47 in the 30 days before it.

After

The first 60 of 92.

Before

Earthquakes todayAlaska earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000cmfs (also filed as ak020er1t7x2). Read Mon, Sep 28, 2026, 2:18 PM UTC.