Alaska earthquakes

M3.2 earthquake 218 km W of Adak, Alaska

A magnitude 3.2 earthquake struck 218 km W of Adak, Alaska on Fri, Oct 9, 2020, 7:36 PM HADT (04:36 UTC), 221 km (138 mi) below the surface.

A larger quake followed: M4.2 168 km WNW of Adak, Alaska. This one was a foreshock.

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The earthquake

Magnitude: 3.2 (ml), minor
Local time: Fri, Oct 9, 2020, 7:36 PM HADT
UTC: 2020-10-10 04:36:05 UTC
Depth: 221.3 km (137.5 mi), intermediate-depth
Epicenter: 52.142° N, 179.792° 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 9.9 km horizontally, 8.8 km in depth
Magnitude uncertainty: ±0.12
Depth from: From location
Station coverage gap: 123°
Stations used: 16

Nearby

Within 100 km, magnitude 1.5 and up: 37 in the 60 days after this one and 36 in the 30 days before it.

After

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000cb93 (also filed as ak020d1r811s). Read Sun, Sep 27, 2026, 7:49 AM UTC.