M2.9 earthquake 250 km W of Adak, Alaska

A magnitude 2.9 earthquake struck 250 km W of Adak, Alaska on Thu, Mar 10, 2022, 1:51 PM GMT+12 (01:51 UTC), 189 km (117 mi) below the surface.

A larger quake followed: M4.6 320 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
2.9	ML, local (Richter)	USGS National Earthquake Information Center	Preferred · Reviewed · ±0.105 · 12 stations
2.6	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: 168 in the 60 days after this one and 59 in the 30 days before it.

The first 60 of 168.

From the USGS Earthquake Hazards Program and its partner networks, event us7000h20x (also filed as ak022364z81w). Read Thu, Oct 1, 2026, 2:24 PM UTC.