M1.8 earthquake 71 km NNW of Aleneva, Alaska

A magnitude 1.8 earthquake struck 71 km NNW of Aleneva, Alaska on Tue, May 11, 2021, 4:47 PM AKDT (00:47 UTC), 2 km (1 mi) below the surface.

Automatic solution: the magnitude and location may still be revised.

A larger quake followed: M4.4 73 km NNE of Karluk, Alaska. This one was a foreshock.

Map

Where this earthquake was located, with the others nearby. Select one for its page.

Different scales measure different things and differ by a few tenths. The USGS marks one as preferred, and it is the one this page uses.

Mag.	Scale	Computed by	Notes
1.8	ML, local (Richter)	Alaska Earthquake Center	Preferred · Preliminary
1.52	ML, local (Richter)	AV	Final · ±0.342363609060001 · 10 stations

No one has reported feeling this quake to the USGS.

An automatic solution; a seismologist may revise it.

Distance and direction from each place to the epicenter, with its forecast.

Within 100 km, magnitude 1.5 and up: 93 in the 60 days after this one and 78 in the 30 days before it.

The first 60 of 93.

From the USGS Earthquake Hazards Program and its partner networks, event ak02162b7wnw (also filed as av91027028). Read Fri, Oct 2, 2026, 2:30 PM UTC.