At 5:12 a.m., the moment the Quake struck, they ring the bells and sound the sirens and alarms.
After that, people migrate to 20th and Dolores Streets, at the top, back corner of Dolores Park, to ceremonially update the paint on the Golden Fire Hydrant. (It was the only one that kept working for many blocks around, and was painted gold afterward in honor of its faithful service.) 2/3