Napa County's more seismically sensitive residents got an early wake-up call this morning, when a 3.2 magnitude earthquake shook some of them out of bed.

According to the US Geological Survey, the quake struck at 5:40 a.m. It had an epicenter about three miles southwest of Napa and about seven miles east southeast of Sonoma, with a depth of 5.2 miles.

At publication time, 279 people had reported to the USGS they they felt the quake, in locations as far afield as Fairfield, American Canyon, and Yountville.

Though the Chron reports that Napa police dispatchers received several calls regarding the quake, CBS5 says that there have not been any reports of damage or injuries.

"We definitely felt it up here. I thought it was going to be bigger than a 3.2," a police dispatcher told the Chron.

According to viewers who contacted KRON4, one felt a “strong jolt” in downtown Napa, while another said that the “ground was rocking and rolling this morning in Napa. The pictures on my wall were swinging.”