M2.8 earthquake 84 km ESE of Atka, Alaska

A magnitude 2.8 earthquake struck 84 km ESE of Atka, Alaska on Sat, Jul 23, 2022, 1:22 PM HADT (22:22 UTC), 35 km (22 mi) below the surface.

A larger quake followed: M4.2 83 km SSE of Atka, 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
2.8	ML, local (Richter)	USGS National Earthquake Information Center	Preferred · Reviewed · ±0.115 · 10 stations
2.3	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: 116 in the 60 days after this one and 76 in the 30 days before it.

The first 60 of 116.

From the USGS Earthquake Hazards Program and its partner networks, event us6000ihy3 (also filed as ak0229dqv5s8). Read Thu, Oct 1, 2026, 9:08 PM UTC.