Alaska earthquakes

M1.8 earthquake 23 km WSW of Adak, Alaska

A magnitude 1.8 earthquake struck 23 km WSW of Adak, Alaska on Mon, Oct 22, 2018, 2:50 AM HADT (11:50 UTC), 73 km (46 mi) below the surface.

A larger quake followed: M4.5 62 km ESE of Adak, Alaska. This one was a foreshock.

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The earthquake

Magnitude
1.8 (ML, local (Richter)), micro
Magnitude from
Alaska Earthquake Center
Local time
UTC
2018-10-22 11:50:39 UTC
Depth
73.3 km (45.5 mi), intermediate-depth
Epicenter
51.793° N, 176.949° 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
12

Nearby

Within 100 km, magnitude 1.5 and up: 156 in the 60 days after this one and 95 in the 30 days before it.

After

The first 60 of 156.

Before

Earthquakes todayAlaska earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak018dk2dy5v (also filed as ak20288797). Read Thu, Oct 1, 2026, 6:49 PM UTC.