THIS STORY HAS BEEN UPDATED.
NORTHERN CALIFORNIA – A 6.0-magnitude quake early Sunday morning was centered in Napa County but felt by thousands of people around Northern California.
The US Geological Survey said the quake occurred at 3:20 a.m.
The quake's epicenter was located three miles northwest of American Canyon, five miles south southwest of Napa and eight miles north northwest of Vallejo, at a depth of 6.7 miles, the survey reported.
Within about an hour and a half after the quake occurred, the US Geological Survey had received nearly 3,000 shake reports from around Northern California and even Nevada.
Clearlake and Hidden Valley Lake residents were among those filing the reports, according to the survey.
Marisa Chilafoe, Lake County's Office of Emergency Services manager, was monitoring the situation early Sunday.
“There have been no immediate reports of damage or injury and the Lake County Office of Emergency Services remains engaged in the incident,” she told Lake County News.
On social media, Napa County residents reported damage to homes, broken glass and gas leaks.
Lake County residents on Facebook and Twitter – some of whom said the quake jolted them from sleep – described the quake as long and rolling.
The US Geological Survey rated the quake's shaking as “violent,” with potential for heavy structure damage.
The California Highway Patrol early Sunday reported defective traffic signals in areas in Napa County along Highway 121 and Highway 29, cracked and elevated roadway sections on Old Sonoma Highway and Old Sonoma Road, and trees and rocks in some roadways.
Pacific Gas and Electric's online outage center was reporting a number of electrical outages around the North Coast at around the time the quake occurred.
Shake reports can be submitted to the US Geological Survey at http://earthquake.usgs.gov/earthquakes/eventpage/nc72282711#dyfi_form .
Email Elizabeth Larson at This email address is being protected from spambots. You need JavaScript enabled to view it. . Follow her on Twitter, @ERLarson, or Lake County News, @LakeCoNews.
Big quake hits Napa County; magnitude 6 temblor felt around region
- Elizabeth Larson
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