Alaska earthquakes

M1.6 earthquake 123 km WSW of Adak, Alaska

A magnitude 1.6 earthquake struck 123 km WSW of Adak, Alaska on Tue, Mar 17, 2020, 7:45 AM HADT (16:45 UTC), 26 km (16 mi) below the surface.

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

More in Alaska

Map

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

Open the live map with earthquakes

The earthquake

Magnitude
1.6 (ML, local (Richter)), micro
Magnitude from
Alaska Earthquake Center
Local time
UTC
2020-03-17 16:45:51 UTC
Depth
25.5 km (15.8 mi), shallow
Epicenter
51.329° N, 178.192° W
Region
Alaska
Tsunami flag
No
Status
Reviewed by a seismologist

Did you feel it?

No one has reported feeling this quake to the USGS.

How well it is located

Reviewed by a seismologist.

Stations used
23

Nearby

Within 100 km, magnitude 1.5 and up: 160 in the 60 days after this one and 138 in the 30 days before it.

After

The first 60 of 160.

Before

Earthquakes todayAlaska earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak0203jm6exc. Read Mon, Oct 5, 2026, 8:10 AM UTC.