Alaska earthquakes

M1.9 earthquake 87 km SE of Adak, Alaska

A magnitude 1.9 earthquake struck 87 km SE of Adak, Alaska on Sun, Sep 23, 2018, 3:58 AM HADT (12:58 UTC), 18 km (11 mi) below the surface.

A larger quake followed: M4.1 72 km SSW of Atka, 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: Sun, Sep 23, 2018, 3:58 AM HADT
UTC: 2018-09-23 12:58:51 UTC
Depth: 18.2 km (11.3 mi), shallow
Epicenter: 51.221° N, 175.927° 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: 11

Nearby

Within 100 km, magnitude 1.5 and up: 116 in the 60 days after this one and 94 in the 30 days before it.

After

The first 60 of 116.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak018c84g232 (also filed as ak20261213). Read Thu, Oct 1, 2026, 10:39 PM UTC.