Alaska earthquakes

M3.3 earthquake 134 km SSE of Chignik, Alaska

A magnitude 3.3 earthquake struck 134 km SSE of Chignik, Alaska on Fri, Feb 23, 2018, 10:09 AM AKST (19:09 UTC), 34 km (21 mi) below the surface.

A larger quake followed: M3.9 54 km SSE of Chignik, 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: 3.3 (ML, local (Richter)), minor
Magnitude from: Alaska Earthquake Center
Local time: Fri, Feb 23, 2018, 10:09 AM AKST
UTC: 2018-02-23 19:09:26 UTC
Depth: 34.3 km (21.3 mi), shallow
Epicenter: 55.273° N, 157.254° 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
3.3	ML, local (Richter)	Alaska Earthquake Center	Preferred · Preliminary
3.3	ML, local (Richter)	USGS National Earthquake Information Center	Reviewed

What happened

The USGS’s account of the effects of this earthquake.

From the USGS event page for ak0182hmdymd. U.S. Geological Survey text and figures are in the public domain.

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: 51

Nearest places

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

Sand Point, AlaskaPopulation 1,064. Forecast206 kmE

Nearby

Within 100 km, magnitude 1.5 and up: 26 in the 60 days after this one and 6 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 ak0182hmdymd (also filed as ak18576676, us2000dbhp). Read Fri, Oct 2, 2026, 7:08 AM UTC.