California Earthquake 2014: American Canyon Epicenter Of 6.0 Quake

California Earthquake Shakemap-14.08.24 — This U.S. Geological Survey shakemap indicates the intensity of the magnitude-6.0 earthquake that struck Northern California early Sunday. U.S. Geological Survey

UPDATE, 9:25 a.m. EDT: NBC News reported more than 50,000 people are now without power following the earthquake.

At this time there's no exact determination of the causative fault, though the Browns Valley section of the West Napa fault is suspected.
— USGS (@USGS) August 24, 2014

There are only a few I reinforced masonry buildings left in Napa and they took a lot of damage. pic.twitter.com/tbCfO4o4rs
— City of Napa (@CityofNapa) August 24, 2014

Original Story:

A magnitude-6.0 earthquake hit Northern California early Sunday, according to the U.S. Geological Survey. The USGS said the quake struck at 3:20 a.m. PDT (6:20 a.m. EDT) four miles northwest of American Canyon and 51 miles west-southwest of Sacramento.

There were no immediate reports of injuries. However, the Pacific Gas and Electric Co. unit of the PG&E Corp. (NYSE:PCG) indicated as many as 15,000 of its customers in the region are without power as a result of the quake:

At least 15,000 customers without power across Northern California, utility provider PG&E's map shows - @pge4me https://t.co/9NrBlFwDVd
— Breaking News (@BreakingNews) August 24, 2014

Some Twitter users reported there had been “serious damage,” although those reports are yet to be confirmed:

Magnitude 6.0 #earthquake hits Napa Valley area in Northern #California, friends and family reporting some serious damage
— Todd Benson (@TBensonBrazil) August 24, 2014

This is a developing story. Check back for updates.

Earthquake