The 3.1 magnitude earthquake that shook the peninsula early Friday morning occurred in a rare area, according to the USGS.
As far as reports go, no one died during the Napa earthquake, but the Allendorf family says they lost someone dear to them: Donald the horse.
A new study suggests certain earthquake fault segments long thought to be stable may rupture and cause a mega-quake.
Pacific Gas and Electric, owner of the Diablo Canyon nuclear power plant near Morrow Bay, plans to map the underwater fault lines to determine their risk to the plant, but environmentalists claim that could kill countless fish.
California Senators Barbara Boxer and Dianne Feinstein have asked the Nuclear Regulatory Commission to inspect two California nuclear plants built near earthquake faults to ensure they can withstand a major quake.