M3.8 earthquake 259 km W of Adak, Alaska

A magnitude 3.8 earthquake struck 259 km W of Adak, Alaska on Wed, Dec 14, 2022, 9:45 AM GMT+12 (21:45 UTC), 192 km (119 mi) below the surface.

A larger quake followed: M6.3 Rat Islands, Aleutian Islands, Alaska. This one was a foreshock.

Map

Where this earthquake was located, with the others nearby. Select one for its page.

Different scales measure different things and differ by a few tenths. The USGS marks one as preferred, and it is the one this page uses.

Mag.	Scale	Computed by	Notes
3.8	mb, body-wave	USGS National Earthquake Information Center	Preferred · Reviewed · ±0.104 · 24 stations
3.8	mb, body-wave	Alaska Earthquake Center	Preliminary

No one has reported feeling this quake to the USGS.

Reviewed by a seismologist.

Within 100 km, magnitude 1.5 and up: 141 in the 60 days after this one and 24 in the 30 days before it.

The first 60 of 141.

From the USGS Earthquake Hazards Program and its partner networks, event us6000j9rv (also filed as ak022fy896kl). Read Fri, Oct 2, 2026, 1:43 AM UTC.