M3.5 earthquake 131 km WNW of Adak, Alaska

A magnitude 3.5 earthquake struck 131 km WNW of Adak, Alaska on Thu, Dec 5, 2024, 7:47 AM HAST (17:47 UTC), 204 km (126 mi) below the surface.

A larger quake followed: M4.0 99 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
3.5	ML, local (Richter)	USGS National Earthquake Information Center	Preferred · Reviewed · ±0.085 · 18 stations
3.2	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: 84 in the 60 days after this one and 37 in the 30 days before it.

The first 60 of 84.

From the USGS Earthquake Hazards Program and its partner networks, event us6000pg20 (also filed as ak024fml4iwp). Read Fri, Oct 2, 2026, 4:38 AM UTC.