A magnitude-4.1 earthquake struck near Napa late Thursday, according to the United States Geological Survey.
The temblor struck at 7:53 p.m. and was centered just northeast of Yountville. The USGS also reported a magnitude-1.6 aftershock at 10:39 p.m.
Firefighters at the Yountville Fire Station reported feeling a strong quake. There was no damage to the station and there has not been any reports of any damage from businesses and residents, according to Napa County Fire Department Battalion Chief Steve Hawks.
Fire crews are now patrolling the area for any potential damage.
Although there was no major damage, some Napa resdients said they were still frightened by the quake.
"I've lived here my entire life. I was born in Napa, raised in Napa," Lynda Deus said. "The earthquake really scares me. I think I would move."
Commenters on NBC Bay Area's Facebook page reported feeling the quake in areas throughout the North Bay, including Vallejo, American Canyon, Suisun and Vacaville.
The quake was also felt down at Redwood City and across to Sacramento, according to reports.
On Aug. 24, 2014, a magnitude 6.0 earthquake shook the city of Napa, resulting in the death of one woman, 200 injuries and a damage estimate of about $400 million. It was the largest quake in the San Francisco Bay Area since the 1989 Loma Prieta earthquake.
USGS scientists are looking into the possibility Thursday's temblor may have been an aftershock from last year's 6.0 quake.