M2.7 earthquake 239 km WSW of Adak, Alaska

A magnitude 2.7 earthquake struck 239 km WSW of Adak, Alaska on Sat, Jan 25, 2020, 7:30 PM GMT-12 (07:30 UTC), 13 km (8 mi) below the surface.

A larger quake followed: M5.8 229 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
2.7	ML, local (Richter)	USGS National Earthquake Information Center	Preferred · Reviewed
2.7	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: 180 in the 60 days after this one and 75 in the 30 days before it.

The first 60 of 180.

From the USGS Earthquake Hazards Program and its partner networks, event us70007qd8 (also filed as ak020174bjoo). Read Thu, Oct 1, 2026, 2:39 AM UTC.