M1.8 earthquake 56 km SSE of Unalaska, Alaska

A magnitude 1.8 earthquake struck 56 km SSE of Unalaska, Alaska on Wed, Mar 28, 2018, 5:06 AM AKDT (13:06 UTC), 44 km (27 mi) below the surface.

A larger quake followed: M4.5 96 km SSE of Akutan, 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: 106 in the 60 days after this one and 53 in the 30 days before it.

The first 60 of 106.

From the USGS Earthquake Hazards Program and its partner networks, event ak018403j6nn (also filed as ak18801334). Read Thu, Oct 1, 2026, 1:46 PM UTC.