Alaska earthquakes

M4.6 earthquake 76 km SSW of Atka, Alaska

A magnitude 4.6 earthquake struck 76 km SSW of Atka, Alaska on Mon, Apr 25, 2016, 5:16 AM HADT (14:16 UTC), 43 km (27 mi) below the surface.

Map

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The earthquake

Magnitude: 4.6 (mb, body-wave), light
Magnitude from: USGS National Earthquake Information Center
Local time: Mon, Apr 25, 2016, 5:16 AM HADT
UTC: 2016-04-25 14:16:46 UTC
Depth: 42.9 km (26.6 mi), shallow
Epicenter: 51.552° N, 174.596° 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
4.6	mb, body-wave	USGS National Earthquake Information Center	Preferred · Reviewed · ±0.039 · 200 stations
4.2	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 5.4 km horizontally, 6.1 km in depth
Magnitude uncertainty: ±0.04
Depth from: From location
Station coverage gap: 89°
Stations used: 260

Nearby

Within 100 km, magnitude 1.6 and up: 126 in the 60 days after this one and 69 in the 30 days before it.

After

The first 60 of 126.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us20005lka (also filed as ak13494311, ak0165c2runn). Read Sun, Oct 4, 2026, 1:56 PM UTC.