M2.7 earthquake 265 km W of Adak, Alaska

A magnitude 2.7 earthquake struck 265 km W of Adak, Alaska on Mon, Apr 22, 2024, 12:08 PM GMT+12 (00:08 UTC), 139 km (86 mi) below the surface.

A larger quake followed: M4.9 254 km WSW 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
2.7	ML, local (Richter)	USGS National Earthquake Information Center	Preferred · Reviewed · ±0.148 · 6 stations
2.6	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: 172 in the 60 days after this one and 51 in the 30 days before it.

The first 60 of 172.

From the USGS Earthquake Hazards Program and its partner networks, event us6000n049 (also filed as ak02456vs05z). Read Mon, Oct 5, 2026, 4:38 AM UTC.