Alaska earthquakes

M3.3 earthquake 13 km WNW of Susitna, Alaska

A magnitude 3.3 earthquake struck 13 km WNW of Susitna, Alaska on Fri, Dec 1, 2017, 7:22 AM AKST (16:22 UTC), 67 km (42 mi) below the surface.

A larger quake followed: M3.9 1 km ENE of Knik, 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: 3.3 (ML, local (Richter)), minor
Magnitude from: Alaska Earthquake Center
Local time: Fri, Dec 1, 2017, 7:22 AM AKST
UTC: 2017-12-01 16:22:17 UTC
Depth: 66.9 km (41.6 mi), shallow
Epicenter: 61.603° N, 150.729° W
Region: Alaska
Felt reports: 1
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

Did you feel it?

1 person reported to the USGS what they felt; the strongest reported shaking was II, weak shaking.

How well it is located

Reviewed by a seismologist.

Stations used: 177

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: at least 199 in the 60 days after this one and 147 in the 30 days before it.

After

The first 60 of at least 199.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak017feaoy8s (also filed as ak17420297, us1000bjy3). Read Sat, Oct 3, 2026, 1:36 AM UTC.