M1.6 earthquake 63 km SE of Pedro Bay, Alaska

A magnitude 1.6 earthquake struck 63 km SE of Pedro Bay, Alaska on Tue, Aug 31, 2021, 5:53 AM AKDT (13:53 UTC), 116 km (72 mi) below the surface.

A larger quake followed: M3.7 46 km NE of Pedro Bay, Alaska. This one was a foreshock.

Map

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

1 person reported to the USGS what they felt; the strongest reported shaking was III, 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 174 in the 30 days before it.

The first 60 of at least 201.

From the USGS Earthquake Hazards Program and its partner networks, event ak021b63nfnk. Read Sat, Oct 3, 2026, 3:29 PM UTC.