M2.3 earthquake 8 km S of Big Lake, Alaska

A magnitude 2.3 earthquake struck 8 km S of Big Lake, Alaska on Thu, Nov 4, 2021, 4:01 PM AKDT (00:01 UTC), 33 km (20 mi) below the surface.

A larger quake followed: M3.5 11 km NNE of Hope, 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
2.3	ML, local (Richter)	Alaska Earthquake Center	Preferred · Preliminary
2.5	ML, local (Richter)	USGS National Earthquake Information Center	Reviewed · ±0.032 · 132 stations

1 person reported to the USGS what they felt; the strongest reported shaking was I, not felt shaking.

Reviewed by a seismologist.

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

Within 100 km, magnitude 1.5 and up: 196 in the 60 days after this one and 137 in the 30 days before it.

The first 60 of 196.

From the USGS Earthquake Hazards Program and its partner networks, event ak021e712hrh (also filed as us7000frjz). Read Fri, Oct 2, 2026, 1:08 AM UTC.