M2.5 earthquake 54 km NNE of Kobuk, Alaska

A magnitude 2.5 earthquake struck 54 km NNE of Kobuk, Alaska on Wed, Dec 8, 2021, 10:52 AM AKST (19:52 UTC), 2 km (1 mi) below the surface.

A larger quake followed: M3.1 56 km NE of Kobuk, 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)	Alaska Earthquake Center	Preferred · Preliminary
2.7	ML, local (Richter)	USGS National Earthquake Information Center	Reviewed · ±0.048 · 58 stations

No one has reported feeling this quake to the USGS.

Reviewed by a seismologist.

Distance and direction from each place to the epicenter, with its forecast.

Within 100 km, magnitude 1.5 and up: 43 in the 60 days after this one and 7 in the 30 days before it.

From the USGS Earthquake Hazards Program and its partner networks, event ak021fpxf6v8 (also filed as us6000gama). Read Thu, Oct 1, 2026, 8:50 PM UTC.