https://cdnph.upi.com/ph/st/th/3811786652740/2026/upi/bee8efb3b8f04264ddd55fc02d5b1602/v1.5/San-Francisco-Bay-Area-rattled-by-magnitude-38-earthquake.jpg" /> The San Francisco Bay area was rattled by a magnitude 3.8 earthquake Thursday morning, according to the U.S. Geological Survey.