Anchorage, AK – A magnitude 3.5 earthquake was recorded Wednesday evening southeast of Tyonek, adding to a week of steady seismic activity across Southcentral Alaska.
According to the Alaska Earthquake Center, the quake occurred at 21:03:56 UTC on Wednesday, registering about 14 kilometers southeast of Tyonek at a depth of 55.3 kilometers. The event was automatically reviewed and cataloged, and no immediate reports of shaking were submitted through the USGS “Felt Report” system.
While quakes of this magnitude are common across the Cook Inlet region, the depth of Wednesday’s event suggests it originated within the subducting Pacific Plate, which regularly produces moderate tremors beneath Southcentral communities including Tyonek, Anchorage, Kenai, and the Mat-Su Borough.
No damage or interruptions to local services have been reported as of Wednesday night. However, residents in Anchorage and the Kenai Peninsula occasionally feel quakes of this size when conditions are right, particularly during quiet nighttime hours.
The Alaska Earthquake Center notes that additional small aftershocks are possible, though none have been detected so far. The region sees thousands of quakes each year, most too small to be felt.
Communities around Cook Inlet are encouraged to maintain standard earthquake readiness—secure heavy furniture, keep emergency kits stocked, and ensure alert systems are enabled on mobile devices.
If you felt today’s earthquake, officials encourage you to submit a report through the USGS Did You Feel It? system, which helps improve scientific understanding of how shaking spreads throughout different parts of Alaska’s varied terrain.
This article was produced by a journalist and may include AI-assisted input. All content is reviewed for accuracy and fairness.
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