M3.6 earthquake 17 km ESE of Susitna North, Alaska

A magnitude 3.6 earthquake struck 17 km ESE of Susitna North, Alaska on Wed, Feb 3, 2021, 10:06 AM AKST (19:06 UTC), 61 km (38 mi) below the surface.

A larger quake followed: M5.3 5 km SSE of Point MacKenzie, 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
3.6	ML, local (Richter)	Alaska Earthquake Center	Preferred · Preliminary
3.8	Mwr, regional moment	USGS National Earthquake Information Center	Reviewed · ±0.053 · 34 stations

54 people reported to the USGS what they felt; the strongest reported shaking was III, weak shaking.

How the rock slipped, from the moment tensor, and the USGS estimate of landslides and liquefaction.

Reviewed by a seismologist.

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

Within 100 km, magnitude 1.5 and up: at least 199 in the 60 days after this one and 161 in the 30 days before it.

The first 60 of at least 199.

From the USGS Earthquake Hazards Program and its partner networks, event ak0211kjmeea (also filed as us6000de93). Read Sun, Oct 4, 2026, 5:21 PM UTC.