US: Magnitude-5.1 offshore earthquake occurs off northwestern California at around 20:04 Sept. 27

A magnitude-5.1 offshore earthquake occurred in the North Pacific Ocean off northwestern California at around 20:04 Sept. 27. The epicenter was about 253 km (157 miles) west-northwest of Eureka. The tremor occurred at a depth of about 10 km (6 miles), and weak shaking was probably felt throughout parts of coastal northwestern California and southwestern Oregon. There have been no initial reports of damage or casualties as a result of the earthquake; 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.