M3.1 earthquake 34 km WSW of Susitna North, Alaska

A magnitude 3.1 earthquake struck 34 km WSW of Susitna North, Alaska on Mon, Oct 21, 2019, 6:04 AM AKDT (14:04 UTC), 60 km (37 mi) below the surface.

A larger quake followed: M4.1 15 km SSE of Susitna, Alaska. This one was a foreshock.

Map

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

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
3.1	ML, local (Richter)	Alaska Earthquake Center	Preferred · Preliminary
3.1	ML, local (Richter)	USGS National Earthquake Information Center	Reviewed

The USGS ShakeMap: shaking estimated from seismic stations and the quake’s size, on the Modified Mercalli intensity scale.

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

Reviewed by a seismologist.

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

Within 100 km, magnitude 1.5 and up: 199 in the 60 days after this one and 150 in the 30 days before it.

The first 60 of 199.

From the USGS Earthquake Hazards Program and its partner networks, event ak019digd0t3 (also filed as us70005wqd). Read Thu, Oct 1, 2026, 9:53 AM UTC.