Alaska earthquakes

M3.3 earthquake 23 km SSW of Susitna, Alaska

A magnitude 3.3 earthquake struck 23 km SSW of Susitna, Alaska on Sat, Feb 11, 2017, 3:21 AM AKST (12:21 UTC), 63 km (39 mi) below the surface.

A larger quake followed: M3.4 43 km SSW of Skwentna, 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: Sat, Feb 11, 2017, 3:21 AM AKST
UTC: 2017-02-11 12:21:41 UTC
Depth: 63.0 km (39.1 mi), shallow
Epicenter: 61.352° N, 150.714° 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 III, weak shaking.

How well it is located

Reviewed by a seismologist.

Stations used: 138

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 198 in the 60 days after this one and 139 in the 30 days before it.

After

The first 60 of 198.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak0171xnud9d (also filed as ak15255046, us20008j66). Read Sun, Oct 4, 2026, 8:50 AM UTC.