M3.4 earthquake 63 km SW of Nikolski, Alaska

A magnitude 3.4 earthquake struck 63 km SW of Nikolski, Alaska on Sat, Jul 30, 2022, 2:19 AM AKDT (10:19 UTC), 52 km (32 mi) below the surface.

A larger quake followed: M3.7 100 km SW of Nikolski, 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	mb, body-wave	USGS National Earthquake Information Center	Preferred · Reviewed · ±0.131 · 14 stations
3.4	mb, body-wave	Alaska Earthquake Center	Preliminary

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

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: 49 in the 60 days after this one and 35 in the 30 days before it.

From the USGS Earthquake Hazards Program and its partner networks, event us6000i6ru (also filed as ak0229p4gnpv). Read Sun, Oct 4, 2026, 8:33 PM UTC.