M2.3 earthquake 92 km S of Atka, Alaska

A magnitude 2.3 earthquake struck 92 km S of Atka, Alaska on Fri, Mar 18, 2016, 5:45 PM HADT (02:45 UTC), 3 km (2 mi) below the surface.

A larger quake followed: M5.2 90 km S of Atka, 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.

Within 100 km, magnitude 1.5 and up: at least 199 in the 60 days after this one and 170 in the 30 days before it.

The first 60 of at least 199.

From the USGS Earthquake Hazards Program and its partner networks, event ak0163mox0ae (also filed as ak13002449). Read Mon, Oct 5, 2026, 3:05 AM UTC.