M2.9 earthquake 53 km SE of Adak, Alaska

A magnitude 2.9 earthquake struck 53 km SE of Adak, Alaska on Sun, May 10, 2020, 4:39 PM HADT (01:39 UTC), 58 km (36 mi) below the surface.

A larger quake followed: M4.0 117 km S 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
2.9	ML, local (Richter)	USGS National Earthquake Information Center	Preferred · Reviewed · ±0.115 · 10 stations
2.5	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: 193 in the 60 days after this one and 102 in the 30 days before it.

The first 60 of 193.

From the USGS Earthquake Hazards Program and its partner networks, event us70009nzx (also filed as ak02062brlzf). Read Fri, Oct 2, 2026, 1:39 AM UTC.