Alaska earthquakes

M3.0 earthquake 48 km NNE of Atka, Alaska

A magnitude 3.0 earthquake struck 48 km NNE of Atka, Alaska on Sun, Aug 13, 2023, 12:12 AM HADT (09:12 UTC), 180 km (112 mi) below the surface.

A larger quake followed: M4.0 48 km N of Atka, Alaska. This one was a foreshock.

Map

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: Sun, Aug 13, 2023, 12:12 AM HADT
UTC: 2023-08-13 09:12:57 UTC
Depth: 180.0 km (111.9 mi), intermediate-depth
Epicenter: 52.575° N, 173.858° 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 · ±0.085 · 18 stations
2.8	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 15.9 km horizontally, 7.2 km in depth
Magnitude uncertainty: ±0.09
Depth from: From location
Station coverage gap: 140°
Stations used: 21

Nearby

Within 100 km, magnitude 1.5 and up: 160 in the 60 days after this one and 38 in the 30 days before it.

After

The first 60 of 160.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000kr2b (also filed as ak023ac9csd0). Read Thu, Oct 1, 2026, 12:24 PM UTC.