M4.6 earthquake 78 km S of Sand Point, Alaska

A magnitude 4.6 earthquake struck 78 km S of Sand Point, Alaska on Thu, Oct 23, 2025, 8:27 AM AKDT (16:27 UTC), 35 km (22 mi) below the surface.

A larger quake followed: M4.7 102 km SSE of Sand Point, 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
4.6	mb, body-wave	USGS National Earthquake Information Center	Preferred · Reviewed · ±0.089 · 38 stations
4.4	ML, local (Richter)	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 1.6 and up: 118 in the 60 days after this one and 23 in the 30 days before it.

The first 60 of 118.

From the USGS Earthquake Hazards Program and its partner networks, event us6000rixc (also filed as ak025dlsrk7u). Read Thu, Oct 1, 2026, 2:35 PM UTC.