M3.9 earthquake 259 km W of Adak, Alaska

A magnitude 3.9 earthquake struck 259 km W of Adak, Alaska on Sun, May 26, 2024, 3:32 PM GMT+12 (03:32 UTC), 179 km (111 mi) below the surface.

A larger quake followed: M4.9 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
3.9	mb, body-wave	USGS National Earthquake Information Center	Preferred · Reviewed · ±0.107 · 23 stations
2.9	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: 148 in the 60 days after this one and 58 in the 30 days before it.

The first 60 of 148.

From the USGS Earthquake Hazards Program and its partner networks, event us6000n11f (also filed as ak0246r5z8jz). Read Thu, Oct 1, 2026, 8:51 PM UTC.