I was in the office when we had the first significant earthquake at our new location: 5.2 magnitude earthquake. Our building seems to have performed well, with just a small amount of low-frequency shaking, and a couple small things falling off people’s shelves. It does serve as a reminder to me to get something to strap my bookcase to the wall at home, though.
Preliminary information is available from the US Geological Survey, as well as California’s Emergency Digital Information Service.