M3.1 earthquake 56 km SSW of Nanwalek, Alaska

A magnitude 3.1 earthquake struck 56 km SSW of Nanwalek, Alaska on Sun, Oct 13, 2019, 10:38 AM AKDT (18:38 UTC), 57 km (35 mi) below the surface.

A larger quake followed: M4.5 56 km WNW of Nanwalek, 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

3 people 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: 146 in the 60 days after this one and 70 in the 30 days before it.

The first 60 of 146.

From the USGS Earthquake Hazards Program and its partner networks, event ak019d5an9v1 (also filed as us70005twt). Read Mon, Oct 5, 2026, 3:27 AM UTC.