M2.8 earthquake 96 km E of Chignik, Alaska

A magnitude 2.8 earthquake struck 96 km E of Chignik, Alaska on Mon, Feb 6, 2023, 1:46 AM AKST (10:46 UTC), 68 km (42 mi) below the surface.

A larger quake followed: M3.5 32 km E of Port Heiden, 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
2.8	ML, local (Richter)	Alaska Earthquake Center	Preferred · Preliminary
2.4	ML, local (Richter)	USGS National Earthquake Information Center	Reviewed · ±0.121 · 9 stations

1 person reported to the USGS what they felt; the strongest reported shaking was II, weak 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: at least 201 in the 60 days after this one and 51 in the 30 days before it.

The first 60 of at least 201.

From the USGS Earthquake Hazards Program and its partner networks, event ak0231pd42dl (also filed as us6000jlqk). Read Fri, Oct 2, 2026, 6:10 AM UTC.