Alaska earthquakes

M4.4 earthquake 106 km SSW of Atka, Alaska

A magnitude 4.4 earthquake struck 106 km SSW of Atka, Alaska on Fri, Jul 26, 2019, 12:14 PM HADT (21:14 UTC), 26 km (16 mi) below the surface.

A larger quake followed: M4.7 92 km SSW 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: 4.4 (Mwr, regional moment), light
Magnitude from: USGS National Earthquake Information Center
Local time: Fri, Jul 26, 2019, 12:14 PM HADT
UTC: 2019-07-26 21:14:48 UTC
Depth: 26.3 km (16.4 mi), shallow
Epicenter: 51.347° N, 174.901° 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
4.4	Mwr, regional moment	USGS National Earthquake Information Center	Preferred · Reviewed · ±0.078 · 16 stations
4.5	ML, local (Richter)	Alaska Earthquake Center	Preliminary

Did you feel it?

No one has reported feeling this quake to the USGS.

Fault motion and ground failure

How the rock slipped, from the moment tensor, and the USGS estimate of landslides and liquefaction.

Faulting: Oblique reverse
Moment magnitude: 4.4 Mwr
Nodal plane 1: Strike 234°, dip 86°, rake 132°
Nodal plane 2: Strike 328°, dip 42°, rake 5°

How well it is located

Reviewed by a seismologist.

Location uncertainty: About 6.8 km horizontally, 4.6 km in depth
Magnitude uncertainty: ±0.08
Depth from: From location
Station coverage gap: 116°
Stations used: 188

Nearby

Within 100 km, magnitude 1.5 and up: 100 in the 60 days after this one and 58 in the 30 days before it.

After

The first 60 of 100.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us60004w62 (also filed as ak0199iou1sv). Read Fri, Oct 2, 2026, 12:07 AM UTC.