M2.5 earthquake 21 km NE of Chiniak, Alaska

A magnitude 2.5 earthquake struck 21 km NE of Chiniak, Alaska on Fri, Sep 19, 2025, 3:59 AM AKDT (11:59 UTC), 50 km (31 mi) below the surface.

Automatic solution: the magnitude and location may still be revised.

A larger quake followed: M3.5 74 km ESE of Chiniak, 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
2.5	ML, local (Richter)	Alaska Earthquake Center	Preferred · Preliminary
2.6	ML, local (Richter)	USGS National Earthquake Information Center	Reviewed · ±0.05 · 52 stations

No one has reported feeling this quake to the USGS.

An automatic solution; a seismologist may revise it.

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

Within 100 km, magnitude 1.5 and up: 17 in the 60 days after this one and 13 in the 30 days before it.

From the USGS Earthquake Hazards Program and its partner networks, event ak025c1hpcus (also filed as us7000qxa3). Read Sat, Oct 3, 2026, 3:03 PM UTC.