M3.4 earthquake 39 km NE of Fox River, Alaska

A magnitude 3.4 earthquake struck 39 km NE of Fox River, Alaska on Tue, Jan 21, 2020, 10:27 AM AKST (19:27 UTC), 39 km (24 mi) below the surface.

A larger quake followed: M3.9 1 km SW of Funny River, 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
3.4	ML, local (Richter)	Alaska Earthquake Center	Preferred · Preliminary
3.6	ML, local (Richter)	USGS National Earthquake Information Center	Reviewed · ±0.025 · 210 stations

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

7 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: 115 in the 60 days after this one and 69 in the 30 days before it.

The first 60 of 115.

From the USGS Earthquake Hazards Program and its partner networks, event ak020z1rezt (also filed as us60007cam). Read Sat, Oct 3, 2026, 3:11 AM UTC.