Alaska earthquakes

M3.0 earthquake 91 km SE of Adak, Alaska

A magnitude 3.0 earthquake struck 91 km SE of Adak, Alaska on Thu, Jun 14, 2018, 1:48 PM HADT (22:48 UTC), 35 km (22 mi) below the surface.

A larger quake followed: M5.2 97 km SSW of Atka, Alaska. This one was a foreshock.

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Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude: 3.0 (ML, local (Richter)), minor
Magnitude from: USGS National Earthquake Information Center
Local time: Thu, Jun 14, 2018, 1:48 PM HADT
UTC: 2018-06-14 22:48:13 UTC
Depth: 35.0 km (21.7 mi), shallow
Epicenter: 51.416° N, 175.544° W
Region: Alaska
Tsunami flag: No
Status: Reviewed by a seismologist

Magnitude estimates

Different scales measure different things and differ by a few tenths. The USGS marks one as preferred, and it is the one this page uses.

Mag.	Scale	Computed by	Notes
3.0	ML, local (Richter)	USGS National Earthquake Information Center	Preferred · Reviewed
3.0	ML, local (Richter)	Alaska Earthquake Center	Preliminary

Did you feel it?

No one has reported feeling this quake to the USGS.

How well it is located

Reviewed by a seismologist.

Location uncertainty: About 5.2 km horizontally, 2.0 km in depth
Depth from: Operator assigned
Station coverage gap: 235°, poorly surrounded by stations
Stations used: 19

Nearby

Within 100 km, magnitude 1.5 and up: 127 in the 60 days after this one and 44 in the 30 days before it.

After

The first 60 of 127.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us1000ervj (also filed as ak0187l9248q, ak19770980). Read Thu, Oct 1, 2026, 6:28 PM UTC.