One time I was in San Francisco and we felt a fairly big shake. We were in an old building and were not certain if it was an earthquake. A quick search on Twitt

One time I was in San Francisco and we felt a fairly big shake. We were in an old building and were not certain if it was an earthquake. A quick search on Twitter showed that it was in fact and earthqake and tweets mentioned specific details about it. I looked on sfgate.com and they still didn't have anything posts (since it was just second after it happened).