A preliminary magnitude 2.7 earthquake struck near Lake Davis in Northern California on Tuesday morning, according to the U.S. Geological Survey.

The earthquake occurred at 8:16 a.m. about six-tenths of a mile north of Lake Davis and about 5 miles north of Portola, according to the agency.

The earthquake’s magnitude and location were determined by an automated system and had not yet been reviewed by a seismologist.

The preliminary findings could be revised.

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