US: Magnitude-4.5 earthquake occurs in northern California at around 20:46 June 21

A magnitude-4.5 earthquake occurred in northern California at around 20:46 June 21. The epicenter was about 5 km (3 miles) west-southwest of Laytonville. The tremor occurred at a depth of about 3 km (2 miles), and weak-to-light shaking was probably felt in parts of northern California, including Eureka, Mendocino, and in the broader Napa Valley region. There have been no initial reports of damage or casualties as a result of the earthquake. It could take several hours until authorities can conduct comprehensive damage assessments, especially in remote areas. Aftershocks are possible over the coming days.

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.