4.9 Earthquake Hits Off California Coast Near Eureka, No Tsunami Warning


A earthquake hit today off the California coast, near Eureka, Arcata, and Fortuna.

The quake was 32 miles west/northwest of Eureka; 34 miles west of McKinleyville; 35 miles west/northeast of Arcata; and 37 miles west/northwest of Bayside, reported the U.S. Geological Survey. 

The location of the quake is basically straight west of McKinleyville. 

At least 150 people reported feeling the quake to the Eureka Times-Standard (partly in this post), with some saying items fell off of shelves during the quake.

“It sure felt longer than one second, and shook our house quite hard!” said Benita Robinson.

“Shook me up and shook the house as well,” said Kaija York.

” My nerves are damaged,” said Kate Newton.

Lori Dengler, a geology professor at Humboldt State University, said that the quake appears to have occurred in the middle of the Gorda Plate. 

“It was caused by a fault within a plate, not at the boundary between two plates. Our offshore Gorda plate is an unusual plate because so many earthquakes happen within it. The January 9, 2010 earthquake was the same type of earthquake,” she said. ”It’s the most common type of earthquake felt in this area. In 1980, there was a 7.2 magnitude earthquake off of Trinidad.”

If the intensity was any higher, it would have caused damage, she said. 

According to the National Tsunami Warning Center, there is no tsunami watch, warning, or advisory. 

The Redwood Coast Tsunami Work Group said that the earthquake “posed no tsunami threat – the magnitude was too small and strike slip faults don’t move the sea floor vertically.” 

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