Alaska earthquakes

M4.7 earthquake 128 km SW of Adak, Alaska

A magnitude 4.7 earthquake struck 128 km SW of Adak, Alaska on Thu, Nov 29, 2018, 1:24 AM HAST (11:24 UTC), 35 km (22 mi) below the surface.

A larger quake followed: M5.9 Andreanof Islands, Aleutian Islands, Alaska. This one was a foreshock.

Map

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

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The earthquake

Magnitude: 4.7 (mb, body-wave), light
Magnitude from: USGS National Earthquake Information Center
Local time: Thu, Nov 29, 2018, 1:24 AM HAST
UTC: 2018-11-29 11:24:08 UTC
Depth: 35.0 km (21.7 mi), shallow
Epicenter: 51.202° N, 178.136° 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
4.7	mb, body-wave	USGS National Earthquake Information Center	Preferred · Reviewed · ±0.031 · 319 stations
4.7	mb, body-wave	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 3.4 km horizontally, 2.0 km in depth
Magnitude uncertainty: ±0.03
Depth from: Operator assigned
Station coverage gap: 141°
Stations used: 103

Nearby

Within 100 km, magnitude 1.7 and up: 182 in the 60 days after this one and 58 in the 30 days before it.

After

The first 60 of 182.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us1000hxu0 (also filed as ak20414892, ak018fawnhvm). Read Sun, Oct 4, 2026, 10:20 AM UTC.