Significant magnitude 5.1 quake hits 23 miles southeast of Nikolski, Alaska, United States in the afternoon

A magnitude 5.1 earthquake near Nikolski, Aleutians West, Alaska, USA, was reported only 13 minutes ago by the German Research Centre for Geosciences (GFZ), considered one of the key international agencies that monitor seismic activity worldwide. The earthquake occurred at a shallow depth of 6.2 miles beneath the epicenter in the afternoon on Sunday, April 27th, 2025, at 5:35 pm local time. The exact magnitude, epicenter, and depth of the quake might be revised within the next few hours or minutes as seismologists review data and refine their calculations, or as other agencies issue their report.
Our monitoring service identified a second report from the citizen-seismograph network of RaspberryShake which listed the quake at magnitude 5.1 as well. Other agencies reporting the same quake include France's Réseau National de Surveillance Sismique (RéNaSS) at magnitude 5.0, and the European-Mediterranean Seismological Centre (EMSC) at magnitude 5.0.
Generally quakes of this magnitude are recorded by more than one agency and the results can vary, with subsequent reports that come in after the first one often showing more accuracy.
Based on the preliminary seismic data, the quake was probably felt by many people in the area of the epicenter. It should not have caused significant damage, other than objects falling from shelves, broken windows, etc.
In Nikolski (pop. 18) located 23 miles from the epicenter, the quake should have been felt as light shaking.
VolcanoDiscovery will automatically update magnitude and depth if these change and follow up if other significant news about the quake become available. If you’re in the area, please send us your experience through our reporting mechanism, either online or via our mobile app. This will help us provide more first-hand updates to anyone around the globe who wants to know more about this quake.


Earthquake data:
Date & time: Apr 27, 2025 05:35 pm (GMT -9) local time (28 Apr 2025 02:35 GMT)
Magnitude: 5.1
Depth: 10.00 km
Epicenter latitude / longitude: 52.61°N / 168.72°W (Alaska, United States)
Primary data source: GFZ
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