M4.8 earthquake 145 km WSW of Adak, Alaska

A magnitude 4.8 earthquake struck 145 km WSW of Adak, Alaska on Wed, Sep 7, 2022, 11:41 AM HADT (20:41 UTC), 54 km (34 mi) below the surface.

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
4.8	mb, body-wave	USGS National Earthquake Information Center	Preferred · Reviewed · ±0.027 · 418 stations
4.8	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.

1 person reported to the USGS what they felt; the strongest reported shaking was II, weak shaking.

Reviewed by a seismologist.

Within 100 km, magnitude 1.8 and up: 126 in the 60 days after this one and 51 in the 30 days before it.

The first 60 of 126.

From the USGS Earthquake Hazards Program and its partner networks, event us6000ihz6 (also filed as ak022bhsi87w). Read Thu, Oct 1, 2026, 8:42 AM UTC.