Kasilof, Alaska — A magnitude 4.0 earthquake struck east-southeast of Kasilof Friday afternoon, prompting regional seismic monitoring across Alaska’s Kenai Peninsula.
According to the Alaska Earthquake Center, the earthquake occurred at 15:31:01 UTC Friday and was located 33 kilometers (about 20 miles) east-southeast of Kasilof.
Seismologists report the quake occurred at a depth of approximately 55.8 kilometers, indicating a relatively deep seismic event beneath the region.
Initial automatic analysis listed the earthquake at magnitude 3.9, but updated seismic processing later revised the magnitude to 4.0 as additional data from monitoring stations was analyzed.
Earthquakes of this size are generally considered light to moderate and may be felt in nearby communities depending on distance, depth, and local ground conditions.
As of Friday, no immediate reports of damage or injuries have been associated with the event.
The Kenai Peninsula region, located south of Anchorage, experiences frequent seismic activity due to the subduction of the Pacific Plate beneath the North American Plate, part of the broader tectonic system responsible for many of Alaska’s earthquakes.
The Alaska Earthquake Center encourages residents who may have felt shaking to submit reports through its “Did You Feel It?” citizen science reporting system, which helps scientists map shaking intensity and improve earthquake monitoring accuracy.
For commuters, workers, and students across the Kenai Peninsula, events like this serve as reminders of the region’s active geology and the importance of basic earthquake preparedness.
Seismologists continue reviewing the data, and minor adjustments to the quake’s location, depth, or magnitude remain possible as additional seismic readings are analyzed.
This article was produced by a journalist and may include AI-assisted input.
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