Alaska earthquakes

M3.0 earthquake 111 km S of Atka, Alaska

A magnitude 3.0 earthquake struck 111 km S of Atka, Alaska on Fri, Mar 18, 2016, 9:38 PM HADT (06:38 UTC), 22 km (14 mi) below the surface.

A larger quake followed: M5.2 90 km S of Atka, Alaska. This one was a foreshock.

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

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The earthquake

Magnitude: 3.0 (ML, local (Richter)), minor
Magnitude from: USGS National Earthquake Information Center
Local time: Fri, Mar 18, 2016, 9:38 PM HADT
UTC: 2016-03-19 06:38:52 UTC
Depth: 22.4 km (13.9 mi), shallow
Epicenter: 51.200° N, 174.071° W
Region: Alaska
Tsunami flag: No
Status: Reviewed by a seismologist

Magnitude estimates

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
3.0	ML, local (Richter)	USGS National Earthquake Information Center	Preferred · Reviewed
3.0	ML, local (Richter)	Alaska Earthquake Center	Preliminary

Did you feel it?

No one has reported feeling this quake to the USGS.

How well it is located

Reviewed by a seismologist.

Location uncertainty: About 11.1 km horizontally, 10.0 km in depth
Stations used: 19

Nearby

Within 100 km, magnitude 1.5 and up: 187 in the 60 days after this one and 171 in the 30 days before it.

After

The first 60 of 187.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us20005d0z (also filed as ak0163mr99wu, ak13003484). Read Sun, Oct 4, 2026, 6:41 PM UTC.