M2.2 earthquake 13 km SE of Tyonek, Alaska

A magnitude 2.2 earthquake struck 13 km SE of Tyonek, Alaska on Thu, May 28, 2020, 2:24 PM AKDT (22:24 UTC), 49 km (31 mi) below the surface.

A larger quake followed: M3.9 14 km NW of Nikiski, 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
2.2	ML, local (Richter)	Alaska Earthquake Center	Preferred · Preliminary
2.4	ML, local (Richter)	USGS National Earthquake Information Center	Reviewed · ±0.035 · 106 stations

No one has reported feeling this quake to the USGS.

Reviewed by a seismologist.

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

Within 100 km, magnitude 1.5 and up: 195 in the 60 days after this one and 115 in the 30 days before it.

The first 60 of 195.

From the USGS Earthquake Hazards Program and its partner networks, event ak0206usbgnq (also filed as us6000a1dd). Read Fri, Oct 2, 2026, 5:42 AM UTC.