M4.2 earthquake 256 km ESE of Chiniak, Alaska

A magnitude 4.2 earthquake struck 256 km ESE of Chiniak, Alaska on Tue, Jan 23, 2018, 3:08 AM AKST (12:08 UTC), 8 km (5 mi) below the surface.

A larger quake followed: M5.5 256 km ESE of Chiniak, 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: at least 200 in the 60 days after this one and 53 in the 30 days before it.

The first 60 of at least 200.

From the USGS Earthquake Hazards Program and its partner networks, event ak018128jxyl. Read Sat, Oct 3, 2026, 9:32 PM UTC.