A powerful 7.0 earthquake struck off Petrolia, California, on Dec. 5 at 10:44 a.m. PST, triggering a tsunami warning for areas from mid-Oregon to Santa Cruz. The quake’s epicenter was 39 miles northwest of Petrolia at a shallow depth of 0.4 miles, according to the USGS.

Residents along the coast felt intense shaking, though initial reports indicate no major damage or injuries. Smaller aftershocks of magnitude 4.2 and 3.3 followed.

Emergency teams remain on high alert as officials monitor potential hazardous waves within 186 miles of the epicenter. Residents in affected zones are urged to stay vigilant and await further updates.