San Francisco? Try Loma Prieta, over 50 miles away.
I had my hiring interview with EDS at 1 Beach St in San Francisco the morning of the earthquake. EDS paid for my overnight stay at the nearby Sheraton the night before. I got the job and then drove back to Sacramento via I-80 over the Bay Bridge. I was in the computer lab at school when the earthquake hit. Thought someone was working on the roof.