A strong 7.0 magnitude earthquake has struck off the coast of northern California, according to the US Geological Survey. A tsunami warning has also been issued along the coasts of both northern California and southern Oregon following the quake.

The earthquake’s epicentre was marked near Ferndale, California, a small city in Humboldt County.

It is unclear how widespread the damage is. According to the BBC, multiple aftershocks have been reported since the initial earthquake, which struck around 1400 ET ( 9:00 GMT).

California Governor Gavin Newsom has been briefed on the earthquakes and is meeting with state emergency officials to help coordinate the response. The Humboldt County Sheriff’s Office of Emergency Services said they had not immediately received any reports indicating widespread damage.

Typically, after an earthquake first responders in the area will survey buildings and roads to look for any damage and examine structural integrity.