M1.7 earthquake 97 km WSW of Adak, Alaska

A magnitude 1.7 earthquake struck 97 km WSW of Adak, Alaska on Sun, Dec 17, 2023, 7:11 AM HAST (17:11 UTC), 14 km (8 mi) below the surface.

A larger quake followed: M4.7 134 km SW 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
1.7	ML, local (Richter)	Alaska Earthquake Center	Preferred · Preliminary
1.04	ML, local (Richter)	AV	Final · ±0.328718525684878 · 9 stations

No one has reported feeling this quake to the USGS.

Reviewed by a seismologist.

Within 100 km, magnitude 1.5 and up: 159 in the 60 days after this one and 104 in the 30 days before it.

The first 60 of 159.

From the USGS Earthquake Hazards Program and its partner networks, event ak023g4rtmbm (also filed as av91124878). Read Mon, Oct 5, 2026, 5:23 AM UTC.