US: Magnitude-4.2 offshore earthquake occurs in North Pacific Ocean, west-northwest of Petrolia, Calif., at around 19:15 Nov. 10

A magnitude-4.2 earthquake occurred in the North Pacific Ocean at around 19:15 Nov. 10. The epicenter was about 45 km (28 miles) west-northwest of Petrolia, California. The tremor occurred at a depth of about 18 km (11 miles), and light shaking was probably felt throughout northern California. There have been no initial reports of damage or casualties; however, significant damage is unlikely. It could take several hours until authorities can conduct comprehensive damage assessments, especially in remote areas. Aftershocks are likely over the coming days. The event has not prompted any tsunami advisories.

Officials may temporarily shut down transportation infrastructure in the tremor zone to check for damage. Minor disruptions could occur during shutdowns, but service will likely resume quickly if no damage is found. Utility outages are possible, particularly near the earthquake's epicenter.