M3.8 earthquake 94 km SSE of Nikolski, Alaska

A magnitude 3.8 earthquake struck 94 km SSE of Nikolski, Alaska on Mon, Apr 28, 2025, 1:00 AM AKDT (09:00 UTC), 27 km (17 mi) below the surface.

A larger quake followed: M4.6 88 km SSE 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
3.8	mb, body-wave	USGS National Earthquake Information Center	Preferred · Reviewed · ±0.154 · 11 stations
3.3	ML, local (Richter)	Alaska Earthquake Center	Preliminary

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: 47 in the 60 days after this one and 48 in the 30 days before it.

From the USGS Earthquake Hazards Program and its partner networks, event us7000pvtk (also filed as ak0255farvbd). Read Sat, Oct 3, 2026, 4:50 AM UTC.