A small but noticeable 3.6-magnitude earthquake happened Thursday at 12:41 pm, with an epicenter two miles southeast of Vallejo.
According to the US Geological Survey, a 3.6M earthquake rumbled just south of Vallejo Thursday afternoon, and miled shaking was felt in San Francisco, the East Bay, and parts of the North Bay.
The earthquake appears to have occurred along the Southampton Fault, which appears like a northern extension of the Calaveras Fault — a fault running under the East Bay and down to Hollister, just east of the Hayward Fault…