M4.3 earthquake 48 km SSW of Unalaska, Alaska

A magnitude 4.3 earthquake struck 48 km SSW of Unalaska, Alaska on Sun, May 11, 2025, 1:29 AM AKDT (09:29 UTC), 74 km (46 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
4.3	mb, body-wave	USGS National Earthquake Information Center	Preferred · Reviewed · ±0.047 · 126 stations
4.4	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.

10 people reported to the USGS what they felt; the strongest reported shaking was IV, light shaking.

Reviewed by a seismologist.

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

Within 100 km, magnitude 1.5 and up: 146 in the 60 days after this one and 69 in the 30 days before it.

The first 60 of 146.

From the USGS Earthquake Hazards Program and its partner networks, event us7000pylz (also filed as ak02560sxl16). Read Mon, Oct 5, 2026, 8:25 AM UTC.