Alaska earthquakes

M3.6 earthquake 48 km SSE of Adak, Alaska

A magnitude 3.6 earthquake struck 48 km SSE of Adak, Alaska on Fri, Feb 28, 2025, 4:53 PM HAST (02:53 UTC), 34 km (21 mi) below the surface.

A larger quake followed: M6.2 88 km SSE of Adak, 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: 3.6 (ML, local (Richter)), minor
Magnitude from: USGS National Earthquake Information Center
Local time: Fri, Feb 28, 2025, 4:53 PM HAST
UTC: 2025-03-01 02:53:19 UTC
Depth: 33.8 km (21.0 mi), shallow
Epicenter: 51.477° N, 176.363° 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
3.6	ML, local (Richter)	USGS National Earthquake Information Center	Preferred · Reviewed · ±0.085 · 18 stations
3.3	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 3.9 km horizontally, 6.9 km in depth
Magnitude uncertainty: ±0.09
Depth from: From location
Station coverage gap: 200°, poorly surrounded by stations
Stations used: 21

Nearby

Within 100 km, magnitude 1.5 and up: at least 202 in the 60 days after this one and 118 in the 30 days before it.

After

The first 60 of at least 202.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000pp3c (also filed as ak0252r9r3eb). Read Thu, Oct 1, 2026, 11:22 PM UTC.