Alaska earthquakes

M3.8 earthquake 292 km WSW of Adak, Alaska

A magnitude 3.8 earthquake struck 292 km WSW of Adak, Alaska on Tue, Nov 28, 2023, 12:19 AM GMT+12 (12:19 UTC), 35 km (22 mi) below the surface.

A larger quake followed: M4.3 Rat Islands, Aleutian Islands, Alaska. This one was a foreshock.

Map

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The earthquake

Magnitude: 3.8 (mb, body-wave), minor
Magnitude from: USGS National Earthquake Information Center
Local time: Tue, Nov 28, 2023, 12:19 AM GMT+12
UTC: 2023-11-27 12:19:09 UTC
Depth: 35.0 km (21.7 mi), shallow
Epicenter: 50.969° N, 179.417° E
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
3.8	mb, body-wave	USGS National Earthquake Information Center	Preferred · Reviewed · ±0.113 · 20 stations
3.1	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 8.9 km horizontally, 2.0 km in depth
Magnitude uncertainty: ±0.11
Depth from: Operator assigned
Station coverage gap: 225°, poorly surrounded by stations
Stations used: 43

Nearby

Within 100 km, magnitude 1.5 and up: 54 in the 60 days after this one and 46 in the 30 days before it.

After

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000lf4u (also filed as ak023f7m566d). Read Sat, Oct 3, 2026, 12:00 AM UTC.