M1.6 earthquake 31 km E of Ruby, Alaska

A magnitude 1.6 earthquake struck 31 km E of Ruby, Alaska on Tue, Mar 16, 2021, 6:38 PM AKDT (02:38 UTC), 6 km (3 mi) below the surface.

A larger quake followed: M2.8 66 km NW of Lake Minchumina, 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: 5 in the 60 days after this one and 7 in the 30 days before it.

From the USGS Earthquake Hazards Program and its partner networks, event ak0213hq9eow. Read Thu, Oct 1, 2026, 5:27 AM UTC.