M3.9 earthquake 198 km SSE of Atka, Alaska

A magnitude 3.9 earthquake struck 198 km SSE of Atka, Alaska on Sat, May 10, 2025, 2:55 AM HADT (11:55 UTC), 10 km (6 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
3.9	mb, body-wave	USGS National Earthquake Information Center	Preferred · Reviewed · ±0.066 · 61 stations
3.7	ML, local (Richter)	Alaska Earthquake Center	Preliminary

No one has reported feeling this quake to the USGS.

Reviewed by a seismologist.

Within 100 km, magnitude 1.5 and up: 23 in the 60 days after this one and 5 in the 30 days before it.

From the USGS Earthquake Hazards Program and its partner networks, event us7000pyex (also filed as ak0255z6qwq2). Read Fri, Oct 2, 2026, 5:52 AM UTC.