M3.7 earthquake 43 km N of Adak, Alaska

A magnitude 3.7 earthquake struck 43 km N of Adak, Alaska on Mon, Nov 24, 2025, 3:17 PM HAST (01:17 UTC), 223 km (138 mi) below the surface.

A larger quake followed: M4.9 57 km SSE 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
3.7	mb, body-wave	USGS National Earthquake Information Center	Preferred · Reviewed · ±0.167 · 9 stations
2.5	ML, local (Richter)	Alaska Earthquake Center	Reviewed · ±0.5 · 14 stations

No one has reported feeling this quake to the USGS.

Reviewed by a seismologist.

Within 100 km, magnitude 1.5 and up: 66 in the 60 days after this one and 10 in the 30 days before it.

The first 60 of 66.

From the USGS Earthquake Hazards Program and its partner networks, event us6000s7uz (also filed as ak2025xeestm). Read Fri, Oct 2, 2026, 8:55 PM UTC.