M4.9 earthquake 51 km S of Adak, Alaska

A magnitude 4.9 earthquake struck 51 km S of Adak, Alaska on Wed, Jan 22, 2025, 3:26 AM HAST (13:26 UTC), 45 km (28 mi) below the surface.

A larger quake followed: M6.2 88 km SSE 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
4.9	Mww, W-phase moment	USGS National Earthquake Information Center	Preferred · Reviewed · ±0.11 · 8 stations
4.9	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.

No one has reported feeling this quake to the USGS.

Reviewed by a seismologist.

Within 100 km, magnitude 1.9 and up: at least 202 in the 60 days after this one and 111 in the 30 days before it.

The first 60 of at least 202.

From the USGS Earthquake Hazards Program and its partner networks, event us6000plkr (also filed as ak02510lpupy). Read Fri, Oct 2, 2026, 5:54 AM UTC.