Alaska earthquakes

M2.8 earthquake 198 km SE of Chiniak, Alaska

A magnitude 2.8 earthquake struck 198 km SE of Chiniak, Alaska on Wed, Aug 21, 2019, 3:20 PM AKDT (23:20 UTC), 20 km (13 mi) below the surface.

A larger quake followed: M5.0 273 km SE of Chiniak, Alaska. This one was a foreshock.

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Map

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

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The earthquake

Magnitude: 2.8 (ML, local (Richter)), micro
Magnitude from: USGS National Earthquake Information Center
Local time: Wed, Aug 21, 2019, 3:20 PM AKDT
UTC: 2019-08-21 23:20:49 UTC
Depth: 20.5 km (12.7 mi), shallow
Epicenter: 56.352° N, 149.964° 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
2.8	ML, local (Richter)	USGS National Earthquake Information Center	Preferred · Reviewed · ±0.053 · 46 stations
2.2	ML, local (Richter)	Alaska Earthquake Center	Preliminary
2.2	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.

Location uncertainty: About 7.1 km horizontally, 11.3 km in depth
Magnitude uncertainty: ±0.05
Depth from: From location
Station coverage gap: 221°, poorly surrounded by stations
Stations used: 42

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 74 in the 60 days after this one and 46 in the 30 days before it.

After

The first 60 of 74.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us70005hxr (also filed as aacse019apq18dn, ak019apq18dn). Read Mon, Oct 5, 2026, 6:28 AM UTC.