M2.5 earthquake 216 km W of Adak, Alaska

A magnitude 2.5 earthquake struck 216 km W of Adak, Alaska on Wed, Dec 14, 2022, 2:50 PM HAST (00:50 UTC), 84 km (52 mi) below the surface.

A larger quake followed: M4.2 210 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.

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 · ±0.148 · 6 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: 108 in the 60 days after this one and 50 in the 30 days before it.

The first 60 of 108.

From the USGS Earthquake Hazards Program and its partner networks, event us7000j0yf (also filed as ak022g16uyhx). Read Fri, Oct 2, 2026, 8:24 AM UTC.