A preliminary 2.7 magnitude earthquake struck near San Ramon on Sunday, according to the United States Geological Survey. The quake, which hit at around 1:20 p.m., was centered 3.1 miles southeast of San Ramon, the USGS said. Further information was not immediately available. This is a deve loping story. Details may change as more information becomes available. Stay tuned for updates. BAY AREA QUAKE CENTRAL You can take steps to plan and prepare for the next big one. Access our Bay Area Quake Tracker, the latest earthquake stories, extensive quake prep checklists, videos and many other disaster preparedness resources all in one place: NBCBAYAREA.COM/QUAKES ...read more read less