M2.1 earthquake 89 km ESE of Adak, Alaska

A magnitude 2.1 earthquake struck 89 km ESE of Adak, Alaska on Wed, May 29, 2019, 2:55 AM HADT (11:55 UTC), 25 km (16 mi) below the surface.

A larger quake followed: M4.7 51 km SSW 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
2.1	ML, local (Richter)	Alaska Earthquake Center	Preferred · Preliminary
4.12	ML, local (Richter)	AV	Final · ±0.69 · 5 stations

No one has reported feeling this quake to the USGS.

Reviewed by a seismologist.

Within 100 km, magnitude 1.5 and up: 130 in the 60 days after this one and 56 in the 30 days before it.

The first 60 of 130.

From the USGS Earthquake Hazards Program and its partner networks, event ak0196ulyd88 (also filed as av62007196). Read Sun, Oct 4, 2026, 9:45 PM UTC.