Japan: Magnitude-5.1 offshore earthquake occurs off southern Ryukyu Islands Dec. 11

Event

A magnitude-5.1 earthquake occurred off southern Japan at 1848 Dec. 11. The epicenter was approximately 326 km (203 miles) southwest of Naha, Japan. The tremor occurred at a depth of about 23 km (14 miles), and light shaking was probably felt throughout the southern Ryukyu Islands. There have been no initial reports of damage or casualties as a result of the earthquake, and significant damage is unlikely. It could take several hours until authorities can conduct comprehensive damage assessments, especially in remote areas. Light aftershocks are likely 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.

The event has not prompted any tsunami advisories.

Advice

Plan accordingly for aftershocks. Consider vacating multistory buildings if operating in affected areas until authorities confirm their structural integrity. Allow additional time for air and road travel, as aftershocks may prompt brief disruptions. Seek updated information on road conditions before driving in hilly areas in the affected region due to potential landslides.