Alaska earthquakes

M1.8 earthquake 254 km WSW of Adak, Alaska

A magnitude 1.8 earthquake struck 254 km WSW of Adak, Alaska on Sat, Oct 20, 2018, 12:25 AM GMT+12 (12:25 UTC), 15 km (9 mi) below the surface.

A larger quake followed: M4.3 287 km WSW 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
2018-10-19 12:25:26 UTC
Depth
14.5 km (9.0 mi), shallow
Epicenter
51.284° N, 179.824° E
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
13

Nearby

Within 100 km, magnitude 1.5 and up: 46 in the 60 days after this one and 40 in the 30 days before it.

After

Before

Earthquakes todayAlaska earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak018df47yea (also filed as ak20290834). Read Fri, Oct 2, 2026, 12:44 AM UTC.