M2.6 earthquake 106 km SSE of Perryville, Alaska

A magnitude 2.6 earthquake struck 106 km SSE of Perryville, Alaska on Sun, Oct 17, 2021, 5:24 AM AKDT (13:24 UTC), 34 km (21 mi) below the surface.

A larger quake followed: M5.6 115 km SSE of Perryville, 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
2.6	ML, local (Richter)	Alaska Earthquake Center	Preferred · Preliminary
3.0	ML, local (Richter)	USGS National Earthquake Information Center	Reviewed · ±0.109 · 11 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: 165 in the 60 days after this one and 86 in the 30 days before it.

The first 60 of 165.

From the USGS Earthquake Hazards Program and its partner networks, event ak021dbtqhdg (also filed as us6000g9m2). Read Sun, Oct 4, 2026, 4:33 PM UTC.