M1.9 earthquake 44 km ESE of Nikolski, Alaska

A magnitude 1.9 earthquake struck 44 km ESE of Nikolski, Alaska on Thu, Sep 23, 2021, 3:37 PM AKDT (23:37 UTC), 39 km (24 mi) below the surface.

A larger quake followed: M3.2 109 km SSW of Unalaska, 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: 57 in the 60 days after this one and 32 in the 30 days before it.

From the USGS Earthquake Hazards Program and its partner networks, event ak021c8ava2j. Read Wed, Sep 23, 2026, 11:59 PM UTC.