Nikolski, Alaska – A magnitude 4.3 earthquake struck 188 kilometers south of Nikolski on Sunday, according to the U.S. Geological Survey.
The quake occurred at 18:28:44 UTC at a depth of 10.0 kilometers beneath the surface, based on preliminary data from the USGS National Earthquake Information Center. The epicenter was located in the central Aleutian Islands region, a seismically active area along the Pacific Ring of Fire.
According to USGS data, the event has been reviewed by seismologists. No tsunami warning was issued in connection with the earthquake, and there were no immediate reports of damage or injuries in Nikolski or surrounding Aleutian communities.
Nikolski, a small community on Umnak Island, sits hundreds of miles southwest of Anchorage. The region experiences frequent seismic activity due to tectonic plate movement along the Aleutian subduction zone, where the Pacific Plate slides beneath the North American Plate.
At a depth of 10 kilometers, the quake is considered relatively shallow, though offshore events at this magnitude typically cause minimal surface impact in sparsely populated areas. Residents in parts of the Aleutians may have experienced light shaking, depending on distance from the epicenter.
Air and marine routes in the region were not immediately affected. The nearest significant transportation hubs include Unalaska and Dutch Harbor, both located northeast of the epicenter.
Alaska records thousands of earthquakes annually, though most are too small or remote to cause damage. Events in the magnitude 4 range are common in the Aleutian chain.
Young residents and workers in coastal communities are often encouraged to remain familiar with earthquake preparedness guidance due to the region’s frequent seismic activity.
The USGS continues to monitor the area for aftershocks.
This article was produced by a journalist and may include AI-assisted input.
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