May 24, 2024



M5.1 earthquake hits off Petrolia, California just where the overdue Cascadia Subduction Zone meets the San Andreas Fault

Strange Sounds

July 18, 2021

A magnitude 5.1 earthquake struck off the Northern California coast late Saturday.

According to the U.S. Geological Survey, the earthquake just before midnight was about 12 kilometers (7.5 miles) west of Petrolia in Humboldt County and 56 kilometers (35 miles) southwest of Eureka.

The depth was just over 30 kilometers (18.5 miles).

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