M1.5 earthquake 78 km W of Adak, Alaska

A magnitude 1.5 earthquake struck 78 km W of Adak, Alaska on Sun, Feb 9, 2020, 3:23 AM HAST (13:23 UTC), 6 km (4 mi) below the surface.

A larger quake followed: M5.0 71 km WNW of Adak, Alaska. This one was a foreshock.

Map

Where this earthquake was located, with the others nearby. Select one for its page.

No one has reported feeling this quake to the USGS.

Reviewed by a seismologist.

Within 100 km, magnitude 1.5 and up: at least 200 in the 60 days after this one and at least 200 in the 30 days before it.

The first 60 of at least 200.

From the USGS Earthquake Hazards Program and its partner networks, event ak0201uddkkb. Read Wed, Sep 30, 2026, 8:24 PM UTC.