Alaska earthquakes

M1.9 earthquake 92 km SE of Old Harbor, Alaska

A magnitude 1.9 earthquake struck 92 km SE of Old Harbor, Alaska on Thu, Aug 23, 2018, 4:11 AM AKDT (12:11 UTC), 46 km (28 mi) below the surface.

A larger quake followed: M3.0 123 km SSE of Akhiok, Alaska. This one was a foreshock.

Womens Bay forecast More in Alaska

Map

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

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The earthquake

Magnitude: 1.9 (ML, local (Richter)), micro
Magnitude from: Alaska Earthquake Center
Local time: Thu, Aug 23, 2018, 4:11 AM AKDT
UTC: 2018-08-23 12:11:11 UTC
Depth: 45.7 km (28.4 mi), shallow
Epicenter: 56.547° N, 152.387° 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
1.9	ML, local (Richter)	Alaska Earthquake Center	Preferred · Preliminary
1.9	ML, local (Richter)	AACSE	Preliminary

Did you feel it?

No one has reported feeling this quake to the USGS.

How well it is located

Reviewed by a seismologist.

Stations used: 12

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 1.5 and up: 25 in the 60 days after this one and 7 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 ak018asui52h (also filed as ak20262264, aacse018asui52h). Read Sun, Oct 4, 2026, 6:18 AM UTC.