A 6.0 earthquake around 3:30 a.m. rocked Northern California on Sunday morning leaving residents rushing into the streets and some older buildings no longer stable enough to live in.

The quake centered about 6 miles southwest of Napa.  State Geologist John Parrish told residents the aftershocks would decrease in magnitude but that buildings that were damaged in the main quake are now susceptible to collapse from the aftershocks.

Queen of the Valley Medical Center in Napa reported 172 patients arrived at a triage tent set up after the quake and that 13 of the patients required immediate admittance to the hospital.  Hospital spokesman Walt Mickens said that one patient is in critical condition while a 13-year-old boy was airlifted to another hospital in critical condition after his home’s fireplace fell on him.

Pacific Gas & Electric said that 2,200 customers were without power on Sunday evening.  A total of 70,000 lost power at some point in the aftermath of the quake.

The quake is also a potential financial disaster for the region as many of the iconic wineries in the region were struck.  One vineyard reported that their entire 2011 and 2012 vintages were destroyed in the collapse of a building.

Some analysts say the quake could foretell a more serious earthquake.  There are concerns that the energy released by the Napa quake could increase pressure on other fault lines throughout the region.