M2.3 earthquake 104 km SE of Unalaska, Alaska

A magnitude 2.3 earthquake struck 104 km SE of Unalaska, Alaska on Thu, Apr 7, 2016, 1:43 AM AKDT (09:43 UTC), 26 km (16 mi) below the surface.

A larger quake followed: M3.9 53 km SE 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: 98 in the 60 days after this one and 40 in the 30 days before it.

The first 60 of 98.

From the USGS Earthquake Hazards Program and its partner networks, event ak0164i8a5jr (also filed as ak13432786). Read Sun, Oct 4, 2026, 4:39 PM UTC.