M1.8 earthquake 167 km W of Adak, Alaska

A magnitude 1.8 earthquake struck 167 km W of Adak, Alaska on Thu, Jul 24, 2025, 5:11 AM HADT (14:11 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M5.9 237 km W of Adak, 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
1.8	ML, local (Richter)	Alaska Earthquake Center	Preferred · Preliminary
1.72	ML, local (Richter)	AV	Final · ±0.266377112051318 · 8 stations

No one has reported feeling this quake to the USGS.

Reviewed by a seismologist.

Within 100 km, magnitude 1.5 and up: 156 in the 60 days after this one and 130 in the 30 days before it.

The first 60 of 156.

From the USGS Earthquake Hazards Program and its partner networks, event ak0259f9kn5d (also filed as av93686526). Read Fri, Oct 2, 2026, 4:47 PM UTC.