M1.7 earthquake 192 km WSW of Adak, Alaska

A magnitude 1.7 earthquake struck 192 km WSW of Adak, Alaska on Tue, Jan 21, 2020, 3:34 PM HAST (01:34 UTC), 25 km (16 mi) below the surface.

A larger quake followed: M6.1 240 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.

No one has reported feeling this quake to the USGS.

Reviewed by a seismologist.

Within 100 km, magnitude 1.5 and up: at least 199 in the 60 days after this one and 64 in the 30 days before it.

The first 60 of at least 199.

From the USGS Earthquake Hazards Program and its partner networks, event ak02010emdmy. Read Fri, Oct 2, 2026, 10:46 PM UTC.