Did you feel it? A small tremor shook San Francisco this afternoon at 2:57 p.m., right on the 105-year anniversary of the Great Quake of 1906. According to USGMC, the earthquake registered 3.8, located just south of San Francisco and 2 miles south of Pacifica. We'll update as soon as we know more about today's minor anniversary nudge.

Update: SF Appeal reports: "As is customary with earthquakes, BART service has been susp[ended while their tracks are inspected. If nothing untoward is discovered, service should resume in the next 10 minutes." Expect BART delays.