Alaska earthquakes

M2.0 earthquake 42 km S of Chiniak, Alaska

A magnitude 2.0 earthquake struck 42 km S of Chiniak, Alaska on Tue, Aug 21, 2018, 4:45 PM AKDT (00:45 UTC), 4 km (3 mi) below the surface.

A larger quake followed: M2.9 32 km SSE of Old Harbor, 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: 2.0 (ML, local (Richter)), micro
Magnitude from: Alaska Earthquake Center
Local time: Tue, Aug 21, 2018, 4:45 PM AKDT
UTC: 2018-08-22 00:45:38 UTC
Depth: 4.2 km (2.6 mi), shallow
Epicenter: 57.229° N, 152.244° 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
2.0	ML, local (Richter)	Alaska Earthquake Center	Preferred · Preliminary
2.0	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: 26

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 24 in the 60 days after this one and 17 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 ak018ar00xqf (also filed as ak20261909, aacse018ar00xqf). Read Thu, Oct 1, 2026, 8:34 AM UTC.