M1.8 earthquake 85 km NNW of Karluk, Alaska

A magnitude 1.8 earthquake struck 85 km NNW of Karluk, Alaska on Tue, Sep 5, 2023, 9:06 PM AKDT (05:06 UTC), 2 km (1 mi) below the surface.

A larger quake followed: M3.1 85 km NNW of Karluk, 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
1.8	ML, local (Richter)	Alaska Earthquake Center	Preferred · Preliminary
1.54	ML, local (Richter)	AV	Final · ±0.232284693105277 · 18 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: 172 in the 60 days after this one and 85 in the 30 days before it.

The first 60 of 172.

From the USGS Earthquake Hazards Program and its partner networks, event ak023bfvtzee (also filed as av92031751). Read Fri, Oct 2, 2026, 6:16 PM UTC.