Alaska earthquakes

M1.9 earthquake 128 km W of Adak, Alaska

A magnitude 1.9 earthquake struck 128 km W of Adak, Alaska on Mon, Apr 30, 2018, 7:33 AM HADT (16:33 UTC), 21 km (13 mi) below the surface.

A larger quake followed: M4.5 208 km W of Adak, Alaska. This one was a foreshock.

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The earthquake

Magnitude: 1.9 (ML, local (Richter)), micro
Magnitude from: Alaska Earthquake Center
Local time: Mon, Apr 30, 2018, 7:33 AM HADT
UTC: 2018-04-30 16:33:25 UTC
Depth: 20.6 km (12.8 mi), shallow
Epicenter: 51.740° N, 178.482° 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: 19

Nearby

Within 100 km, magnitude 1.5 and up: 108 in the 60 days after this one and 43 in the 30 days before it.

After

The first 60 of 108.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak0185iq7pim (also filed as ak19295792). Read Sat, Oct 3, 2026, 10:48 PM UTC.