M4.1 earthquake 126 km WNW of Adak, Alaska

A magnitude 4.1 earthquake struck 126 km WNW of Adak, Alaska on Tue, Feb 5, 2019, 12:32 AM HAST (10:32 UTC), 260 km (161 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
4.1	mb, body-wave	USGS National Earthquake Information Center	Preferred · Reviewed · ±0.072 · 52 stations
3.3	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: 89 in the 60 days after this one and 39 in the 30 days before it.

The first 60 of 89.

From the USGS Earthquake Hazards Program and its partner networks, event us2000jdk8 (also filed as ak0191nphst2). Read Fri, Oct 2, 2026, 3:17 AM UTC.