Preliminary 5.5-magnitude earthquake strikes off Northern California coast

A preliminary 5.5-magnitude earthquake rattled the Northern California coast Sunday morning.

The U.S. Geological Survey (USGS) says the quake was reported at 11:45 a.m. about 74 miles southwest of Eureka.

It was recorded at a depth of about 1.3 miles. 

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There were no immediate reports of damage or injuries. While there are many variables involved, geologists say damage does not usually occur until the earthquake magnitude reaches somewhere above 4 or 5.

Initially, the USGS said it was a 5.6-magnitude quake.