Alaska earthquakes

M2.7 earthquake 53 km S of Chignik, Alaska

A magnitude 2.7 earthquake struck 53 km S of Chignik, Alaska on Tue, Nov 21, 2017, 12:52 AM AKST (09:52 UTC), 49 km (30 mi) below the surface.

A larger quake followed: M4.8 122 km SE of Perryville, Alaska. This one was a foreshock.

Sand Point 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: 2.7 (ML, local (Richter)), micro
Magnitude from: Alaska Earthquake Center
Local time: Tue, Nov 21, 2017, 12:52 AM AKST
UTC: 2017-11-21 09:52:54 UTC
Depth: 48.7 km (30.3 mi), shallow
Epicenter: 55.821° N, 158.278° 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
2.7	ML, local (Richter)	Alaska Earthquake Center	Preferred · Preliminary
2.7	ML, local (Richter)	USGS National Earthquake Information Center	Reviewed

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: 29

Nearest places

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

Sand Point, AlaskaPopulation 1,064. Forecast150 kmENE

Nearby

Within 100 km, magnitude 1.5 and up: 24 in the 60 days after this one and 14 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 ak017exnbydr (also filed as ak17356412, us2000bv0z). Read Fri, Oct 2, 2026, 2:02 PM UTC.