M4.1 earthquake 101 km SW of Atka, Alaska

A magnitude 4.1 earthquake struck 101 km SW of Atka, Alaska on Thu, May 9, 2019, 5:08 PM HADT (02:08 UTC), 35 km (22 mi) below the surface.

A larger quake followed: M4.4 41 km NE 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
4.1	mb, body-wave	USGS National Earthquake Information Center	Preferred · Reviewed · ±0.052 · 100 stations
4.0	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: 100 in the 60 days after this one and 39 in the 30 days before it.

The first 60 of 100.

From the USGS Earthquake Hazards Program and its partner networks, event us70003j5d (also filed as ak0195z13wvx). Read Thu, Oct 1, 2026, 2:11 PM UTC.