M2.9 earthquake 24 km SSW of Susitna, Alaska

A magnitude 2.9 earthquake struck 24 km SSW of Susitna, Alaska on Sat, May 23, 2020, 11:28 AM AKDT (19:28 UTC), 53 km (33 mi) below the surface.

A larger quake followed: M4.2 7 km SE of Girdwood, 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
2.9	ML, local (Richter)	Alaska Earthquake Center	Preferred · Preliminary
3.1	ML, local (Richter)	USGS National Earthquake Information Center	Reviewed · ±0.028 · 172 stations

The USGS’s account of the effects of this earthquake.

Also felt at Eagle River and Wasilla.

From the USGS event page for ak0206mgv7vs. U.S. Geological Survey text and figures are in the public domain.

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

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: at least 200 in the 60 days after this one and 104 in the 30 days before it.

The first 60 of at least 200.

From the USGS Earthquake Hazards Program and its partner networks, event ak0206mgv7vs (also filed as us70009p6i). Read Fri, Oct 2, 2026, 1:30 AM UTC.