M1.7 earthquake 68 km W of Adak, Alaska

A magnitude 1.7 earthquake struck 68 km W of Adak, Alaska on Mon, Sep 26, 2022, 7:34 AM HADT (16:34 UTC), 17 km (11 mi) below the surface.

A larger quake followed: M4.2 140 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
1.7	ML, local (Richter)	Alaska Earthquake Center	Preferred · Preliminary
1.86	ML, local (Richter)	AV	Final · ±0.154190335412752 · 7 stations

No one has reported feeling this quake to the USGS.

Reviewed by a seismologist.

Within 100 km, magnitude 1.5 and up: at least 199 in the 60 days after this one and 85 in the 30 days before it.

The first 60 of at least 199.

From the USGS Earthquake Hazards Program and its partner networks, event ak022cd5andl (also filed as av91685091). Read Sat, Oct 3, 2026, 2:57 AM UTC.