M2.5 earthquake 53 km ESE of Adak, Alaska

A magnitude 2.5 earthquake struck 53 km ESE of Adak, Alaska on Fri, Dec 16, 2022, 11:07 PM HAST (09:07 UTC), 108 km (67 mi) below the surface.

A larger quake followed: M4.1 77 km NNE of Adak, 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
2.5	ML, local (Richter)	USGS National Earthquake Information Center	Preferred · Reviewed · ±0.128 · 8 stations
2.4	ML, local (Richter)	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: 187 in the 60 days after this one and 103 in the 30 days before it.

The first 60 of 187.

From the USGS Earthquake Hazards Program and its partner networks, event us7000j25a (also filed as ak022g4n19rr). Read Thu, Oct 1, 2026, 5:49 AM UTC.