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.

A 3.7-magnitude earthquake shook the San Francisco Bay Area in Northern California, the U.S. Geological Survey reported. The about 5-mile deep quake hit about three miles northwest from the San Francisco Zoo, at 7:02 a.m. on Friday, Jan. 10, according to the USGS.