M1.6 earthquake Alaska Peninsula

A magnitude 1.6 earthquake struck in the Alaska Peninsula on Fri, Aug 4, 2023, 7:18 AM AKDT (15:18 UTC), 33 km (20 mi) below the surface.

A larger quake followed: M3.6 Alaska Peninsula. This one was a foreshock.

Map

Where this earthquake was located, with the others nearby. Select one for its page.

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: 100 in the 60 days after this one and 64 in the 30 days before it.

The first 60 of 100.

From the USGS Earthquake Hazards Program and its partner networks, event ak0239xh4ebf. Read Thu, Oct 1, 2026, 5:55 PM UTC.