Alaska earthquakes

M4.0 earthquake 73 km NNW of Atka, Alaska

A magnitude 4.0 earthquake struck 73 km NNW of Atka, Alaska on Fri, Mar 15, 2019, 11:21 AM HADT (20:21 UTC), 223 km (138 mi) below the surface.

Map

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

Open the live map with earthquakes

The earthquake

Magnitude: 4.0 (mb, body-wave), light
Magnitude from: USGS National Earthquake Information Center
Local time: Fri, Mar 15, 2019, 11:21 AM HADT
UTC: 2019-03-15 20:21:26 UTC
Depth: 222.6 km (138.3 mi), intermediate-depth
Epicenter: 52.785° N, 174.696° 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
4.0	mb, body-wave	USGS National Earthquake Information Center	Preferred · Reviewed · ±0.123 · 19 stations
3.1	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 9.2 km horizontally, 9.4 km in depth
Magnitude uncertainty: ±0.12
Depth from: From location
Station coverage gap: 133°
Stations used: 62

Nearby

Within 100 km, magnitude 1.5 and up: 13 in the 60 days after this one and 4 in the 30 days before it.

After

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us70003agx (also filed as ak0193epswow). Read Sat, Oct 3, 2026, 10:42 AM UTC.