M1.7 earthquake 47 km SSE of Nelchina, Alaska

A magnitude 1.7 earthquake struck 47 km SSE of Nelchina, Alaska on Thu, Sep 21, 2017, 3:23 PM AKDT (23:23 UTC), 32 km (20 mi) below the surface.

A larger quake followed: M3.5 37 km WNW of Valdez, 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: 78 in the 60 days after this one and 38 in the 30 days before it.

The first 60 of 78.

From the USGS Earthquake Hazards Program and its partner networks, event ak017c4zpmro (also filed as ak16875826). Read Sun, Oct 4, 2026, 7:35 AM UTC.