M3.8 earthquake 124 km NE of Atka, Alaska

A magnitude 3.8 earthquake struck 124 km NE of Atka, Alaska on Tue, Aug 9, 2016, 12:03 AM HADT (09:03 UTC), 228 km (142 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
3.8	mb, body-wave	USGS National Earthquake Information Center	Preferred · Reviewed · ±0.141 · 13 stations
2.7	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: 15 in the 60 days after this one and 8 in the 30 days before it.

From the USGS Earthquake Hazards Program and its partner networks, event us20006u33 (also filed as ak016a7aolz9). Read Sat, Oct 3, 2026, 4:14 PM UTC.