M3.2 earthquake Alaska Peninsula

A magnitude 3.2 earthquake struck in the Alaska Peninsula on Sun, Jan 31, 2021, 6:47 PM AKST (03:47 UTC), 33 km (20 mi) below the surface.

A larger quake followed: M4.3 77 km ESE of Sand Point, 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
3.2	ML, local (Richter)	Alaska Earthquake Center	Preferred · Preliminary
3.9	mb, body-wave	USGS National Earthquake Information Center	Reviewed · ±0.181 · 8 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: 82 in the 60 days after this one and 109 in the 30 days before it.

The first 60 of 82.

From the USGS Earthquake Hazards Program and its partner networks, event ak0211gz9iqq (also filed as us6000dfvi). Read Sun, Oct 4, 2026, 9:41 PM UTC.