M4.3 earthquake 72 km W of Adak, Alaska

A magnitude 4.3 earthquake struck 72 km W of Adak, Alaska on Sun, Jan 13, 2019, 10:48 AM HAST (20:48 UTC), 86 km (53 mi) below the surface.

A larger quake followed: M5.2 122 km WSW 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
4.3	mb, body-wave	USGS National Earthquake Information Center	Preferred · Reviewed · ±0.059 · 83 stations
4.4	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: 144 in the 60 days after this one and 139 in the 30 days before it.

The first 60 of 144.

From the USGS Earthquake Hazards Program and its partner networks, event us2000j3k8 (also filed as ak019lu6i9r). Read Fri, Oct 2, 2026, 3:05 AM UTC.