M1.6 earthquake 30 km SSW of Karluk, Alaska

A magnitude 1.6 earthquake struck 30 km SSW of Karluk, Alaska on Wed, Aug 11, 2021, 3:21 AM AKDT (11:21 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M1.8 Kodiak Island region, Alaska. 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: 95 in the 60 days after this one and 44 in the 30 days before it.

The first 60 of 95.

From the USGS Earthquake Hazards Program and its partner networks, event ak021a8zip9x. Read Wed, Sep 23, 2026, 6:06 AM UTC.