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Moderate magnitude 4.0 earthquake at 225 km depth

13 Sep 04:01 UTC: First to report: EMSC after 31 minutes.
13 Sep 04:02: Now using data updates from USGS

Update Sat, 13 Sep 2025, 04:03

Moderate magnitude 4.0 quake hits 45 miles northwest of Atka, Alaska, United States early evening

Just 32 minutes ago, a 4.0-magnitude earthquake struck near Atka, Aleutians West, Alaska, USA. The tremor was recorded early evening on Friday, September 12th, 2025, at 6:30 pm local time, at an intermediate to considerable depth of 140 miles below the surface.
The event was filed by the United States Geological Survey, the first seismological agency to report it.
A second report was later issued by The Incorporated Research Institutions for Seismology (IRIS), which listed it as a magnitude 4.0 earthquake as well. A third agency, the European-Mediterranean Seismological Centre (EMSC), reported the same quake at magnitude 4.0.
According to preliminary calculations, we do not expect that the quake was felt by many people and did not cause any damage. In Atka (pop. 64, 45 miles away), the quake was probably not felt.

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RSS feed source: Volcano Discovery.com--Global earthquake monitor

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RSS feed source: Volcano Discovery.com--Global earthquake monitor

Sat, 13 Sep 2025, 02:49 | BY: EARTHQUAKEMONITOR

The United States Geological Survey reported a magnitude 7.7 quake in Russia near Petropavlovsk-Kamchatskiy, Kamchatka, only 10 minutes ago. The earthquake hit around noon on Saturday, September 13th, 2025, at 1:37 pm local time at a shallow depth of 10. km. 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.
A second report was later issued by the German Research Centre for Geosciences (GFZ), which listed it as a magnitude 6.5 earthquake. Other agencies reporting the same quake include The Incorporated Research Institutions for Seismology (IRIS) at magnitude 7.7, and France’s Réseau National de Surveillance Sismique (RéNaSS) at magnitude 7.1.
Based on the preliminary seismic data, the quake should have been felt by everybody in the area of the epicenter. In those areas, dangerous ground shaking occurred with the potential to inflict moderate to heavy damage to buildings and other infrastructure.
Towns or cities where the quake likely caused strong ground shaking include
Moderate shaking probably occurred in Paratunka (pop. 1,800) located 145 km from the epicenter.
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

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