Alaska earthquakes

M3.0 earthquake 234 km W of Adak, Alaska

A magnitude 3.0 earthquake struck 234 km W of Adak, Alaska on Sun, Dec 6, 2020, 6:34 PM HAST (04:34 UTC), 106 km (66 mi) below the surface.

A larger quake followed: M6.1 230 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: 3.0 (ml), minor
Local time: Sun, Dec 6, 2020, 6:34 PM HAST
UTC: 2020-12-07 04:34:31 UTC
Depth: 106.5 km (66.2 mi), intermediate-depth
Epicenter: 51.791° N, 179.967° 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 11.3 km horizontally, 12.1 km in depth
Magnitude uncertainty: ±0.13
Depth from: From location
Station coverage gap: 296°, poorly surrounded by stations
Stations used: 25

Nearby

Within 100 km, magnitude 1.5 and up: 51 in the 60 days after this one and 16 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 us7000crcz (also filed as ak020fpodswt). Read Wed, Sep 30, 2026, 5:24 PM UTC.