Alaska earthquakes

M1.9 earthquake 122 km SW of Adak, Alaska

A magnitude 1.9 earthquake struck 122 km SW of Adak, Alaska on Mon, Oct 22, 2018, 1:31 AM HADT (10:31 UTC), 51 km (32 mi) below the surface.

A larger quake followed: M4.7 128 km SW 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
UTC
2018-10-22 10:31:54 UTC
Depth
51.3 km (31.9 mi), shallow
Epicenter
51.252° N, 178.092° 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: 175 in the 60 days after this one and 163 in the 30 days before it.

After

The first 60 of 175.

Before

Earthquakes todayAlaska earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak018dk1oh4u (also filed as ak20307884). Read Thu, Oct 1, 2026, 7:06 PM UTC.