M2.9 earthquake 34 km N of Atka, Alaska

A magnitude 2.9 earthquake struck 34 km N of Atka, Alaska on Sat, Oct 24, 2020, 8:23 AM HADT (17:23 UTC), 193 km (120 mi) below the surface.

A larger quake followed: M5.5 123 km NNE 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
2.9	ML, local (Richter)	USGS National Earthquake Information Center	Preferred · Reviewed · ±0.128 · 8 stations
2.4	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: 43 in the 60 days after this one and 28 in the 30 days before it.

From the USGS Earthquake Hazards Program and its partner networks, event us7000c8jh (also filed as ak020dp4et8g). Read Thu, Oct 1, 2026, 2:43 AM UTC.