M1.5 earthquake 41 km ENE of Adak, Alaska

A magnitude 1.5 earthquake struck 41 km ENE of Adak, Alaska on Sat, Feb 8, 2020, 5:22 AM HAST (15:22 UTC), 5 km (3 mi) below the surface.

A larger quake followed: M4.0 51 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
1.5	ML, local (Richter)	AV	Preferred · Final · ±0.104 · 6 stations
1.6	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: 138 in the 60 days after this one and 70 in the 30 days before it.

The first 60 of 138.

From the USGS Earthquake Hazards Program and its partner networks, event av70869209 (also filed as ak0201sr0tzd). Read Thu, Oct 1, 2026, 4:22 AM UTC.