Alaska earthquakes

M2.5 earthquake 282 km WSW of Adak, Alaska

A magnitude 2.5 earthquake struck 282 km WSW of Adak, Alaska on Mon, Dec 6, 2021, 12:32 PM GMT+12 (00:32 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M5.1 Andreanof Islands, Aleutian Islands, Alaska. This one was a foreshock.

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The earthquake

Magnitude: 2.5 (ml), micro
Local time: Mon, Dec 6, 2021, 12:32 PM GMT+12
UTC: 2021-12-06 00:32:50 UTC
Depth: 10.0 km (6.2 mi), shallow
Epicenter: 50.905° N, 179.610° 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 3.7 km horizontally, 1.9 km in depth
Magnitude uncertainty: ±0.13
Depth from: Operator assigned
Station coverage gap: 262°, poorly surrounded by stations
Stations used: 17

Nearby

Within 100 km, magnitude 1.5 and up: 59 in the 60 days after this one and 47 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 us7000gb56 (also filed as ak021fmay0yj). Read Thu, Sep 24, 2026, 10:50 AM UTC.