Tonga: Magnitude-5.1 offshore earthquake occurs off Nuku'alofa Dec. 18

Event

A magnitude-5.1 earthquake occurred in the South Pacific Ocean off southern Tonga at approximately 14:12 Dec. 18. The epicenter was about 107 km (66 miles) southeast of Nuku'alofa. The tremor occurred at a depth of about 10 km (6 miles), and light shaking was probably felt throughout most of southern Tonga. 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. 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.

Advice

Plan accordingly for aftershocks. Out of an abundance of caution, 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.