A 4.6 magnitude earthquake rocked the East Bay in San Francisco early this morning.
The quake struck at 2.56am at a depth of 7.8 kilometres.
An early estimate suggested the epicentre was around the corner of Dwight Way and Piedmont Avenue, near the UC Berkeley campus, the LA Times reports.
The earthquake was felt near the San Francisco International Airport as an early warning app sounded on phones in the area.
Residents in Walnut Creek, Martinez, Alameda and across the Bay in San Francisco were also affected.
San Francisco Fire Department said there were no reports of damage or injuries in the city.
They advised people to be wary of aftershocks and check for hazards, like gas leaks.
A tsunami was not expected.
The quake occurred along the Hayward fault line, ABC7 news reported.
This news is breaking: more to follow
The epicentre appeared to be near the UC Berkeley campus
