M1.7 earthquake 44 km NW of Nanwalek, Alaska

A magnitude 1.7 earthquake struck 44 km NW of Nanwalek, Alaska on Tue, Jul 20, 2021, 9:33 PM AKDT (05:33 UTC), 66 km (41 mi) below the surface.

A larger quake followed: M3.9 42 km ENE of Pedro Bay, 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: at least 200 in the 60 days after this one and at least 200 in the 30 days before it.

The first 60 of at least 200.

From the USGS Earthquake Hazards Program and its partner networks, event ak0219a5qfa5. Read Thu, Sep 24, 2026, 10:17 AM UTC.