Kodiak Island

An earthquake of magnitude 4.1 was felt by some residents of Kodiak island yesterday morning, although no damage or injury was reported.

The epicenter was recorded as being roughly 19.9 miles southwest of Kodiak Station, just inland of Ugak Bay at 8:24 am. Tremors were felt by some residents living around the Bells Flats area, near Kodiak airport and within the city of Kodiak.

A total of 15 people reported having felt the earthquake to USGS Geologic Hazards Science Center, with 11 of those reports coming from the 99615 zipcode.

“An M4.1 is a relatively small earthquake and doesn’t typically have aftershocks, or if it does, they would be few and small,” said Lisa Wald, geophysicist at USGS Geologic Hazards Science Center. “However, there is no way to know if this is a foreshock to something larger.”

The National Tsunami Warning Center reported no tsunami danger from this earthquake.

Minor earthquakes are relatively common in and around southern Alaska, due to its position within the Aleutian arc, which extends approximately 1,800 miles from the Gulf of Alaska in the east to the Kamchatka Peninsula in the west.This marks the region where the Pacific plate subducts into the mantle beneath the North America plate. 

The Aleutian arc is a seismically active region, evidenced by the many moderate to large earthquakes occurring each year. 

Since 1900, this region has seen twelve large (in excess of M7.5) earthquakes. The easternmost megathrust earthquake was the March 28, 1964, Prince William Sound earthquake, which had a magnitude of 9.2 and is currently the second largest recorded earthquake in history.

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