A 7.0-magnitude earthquake struck off the coast of Northern California on Thursday, triggering a tsunami warning, according to U.S. officials.

A message released by the California Office of Emergency Services, posted on social media, said that a “tsunami Warning is now in effect which includes the coastal areas of California and Oregon from Davenport, California to Douglas/Lane Line, Oregon.”

“Warnings indicate that widespread dangerous coastal flooding accompanied by powerful currents are possible and may continue for several hours after the initial wave arrival,” it also said.

The earthquake struck at a depth of around 6 miles at approximately 10:44 a.m. local time. It was first preliminarily registered as being a 6.6 on the Richter scale, but the USGS upgraded it a 7.0 a short while later.

Several aftershocks of smaller magnitude struck in the area off the coast after the initial 7.0-magnitude temblor, according to the USGS. They include measurements of 4.2, 3.3, and 3.7 on the Richter scale.

About three minutes after the 7.0 earthquake struck, a 5.8-magnitude earthquake also hit inland around 200 miles to the southeast in Cobb, located in Central California, the USGS reported.

According to the USGS, residents in Northern California and California’s Central Valley reported feeling the tremor. Users on social media platform X also reported shaking and other impacts.

Some users also posted screenshots of National Weather Service tsunami warning messages they had received through their phones.

“A series of powerful waves and strong currents may impact coasts near you. You are in danger. Get away from coastal waters,” the notice said. “Move to high ground or inland now. Keep away from the coast until local officials say it is safe to return.”