An earthquake with a preliminary magnitude of 3.47 shook San Francisco Bay Area residents awake on Friday morning, according to the U.S. Geological Survey. The earthquake struck at 7:02 a.m., just 3 miles northwest of the San Francisco Zoo. The shake had a depth of 5.21 miles and no injuries have been reported.

An earthquake with a 3.7 magnitude struck just off the coast of San Francisco, according to data from the U.S. Geological Survey.

A 3.7 preliminary magnitude earthquake struck about 5 kilometers off the coast of San Francisco, according to the U.S. Geological Survey.

Moderate rainfall returned to Northern California early Friday morning as a new storm system came onshore ahead of another round of dangerous surf conditions.