![earthquake generic](https://media.nbcbayarea.com/2021/06/earthquake-generic.jpeg?quality=85&strip=all&resize=320%2C180)
A preliminary 5.1 magnitude earthquake struck just before 11:50 p.m. Saturday near Petrolia in Humboldt County, according to the United States Geological Survey.
It was centered 22 miles southwest of Ferndale, 28 miles miles south-south-west of Eureka and 26.9 miles southwest of Fortuna.
No other details were released.
Are you prepared for the next big one?
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