M2.1 earthquake 70 km WSW of False Pass, Alaska

A magnitude 2.1 earthquake struck 70 km WSW of False Pass, Alaska on Fri, Sep 1, 2023, 7:00 PM AKDT (03:00 UTC), 5 km (3 mi) below the surface.

A larger quake followed: M4.9 108 km SSW of False Pass, 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
2.1	ML, local (Richter)	Alaska Earthquake Center	Preferred · Preliminary
1.88	ML, local (Richter)	AV	Final · ±0.306288430271222 · 11 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: 72 in the 60 days after this one and 44 in the 30 days before it.

The first 60 of 72.

From the USGS Earthquake Hazards Program and its partner networks, event ak023b98gfqi (also filed as av92026381). Read Fri, Oct 2, 2026, 7:52 AM UTC.