M4.8 earthquake 88 km WSW of Nikolski, Alaska

A magnitude 4.8 earthquake struck 88 km WSW of Nikolski, Alaska on Sat, Jul 1, 2023, 5:41 AM AKDT (13:41 UTC), 80 km (50 mi) below the surface.

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
4.8	mb, body-wave	USGS National Earthquake Information Center	Preferred · Reviewed · ±0.03 · 344 stations
4.8	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.

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

Reviewed by a seismologist.

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

Within 100 km, magnitude 1.8 and up: 128 in the 60 days after this one and 28 in the 30 days before it.

The first 60 of 128.

From the USGS Earthquake Hazards Program and its partner networks, event us6000kpg4 (also filed as ak0238d7snmj). Read Fri, Oct 2, 2026, 5:10 AM UTC.