Alaska earthquakes

M3.5 earthquake 48 km SE of Adak, Alaska

A magnitude 3.5 earthquake struck 48 km SE of Adak, Alaska on Sun, Dec 18, 2022, 3:28 PM HAST (01:28 UTC), 55 km (34 mi) below the surface.

A larger quake followed: M4.2 63 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.

Open the live map with earthquakes

The earthquake

Magnitude: 3.5 (mb), minor
Local time: Sun, Dec 18, 2022, 3:28 PM HAST
UTC: 2022-12-19 01:28:26 UTC
Depth: 55.0 km (34.2 mi), shallow
Epicenter: 51.570° N, 176.134° 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 7.2 km horizontally, 13.7 km in depth
Magnitude uncertainty: ±0.15
Depth from: From location
Station coverage gap: 198°, poorly surrounded by stations
Stations used: 34

Nearby

Within 100 km, magnitude 1.5 and up: 192 in the 60 days after this one and 107 in the 30 days before it.

After

The first 60 of 192.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000j2fh (also filed as ak022g7tgzve). Read Wed, Sep 30, 2026, 7:54 PM UTC.