Tonga: A magnitude-5.7 offshore earthquake occurs southwest of Nuku‘alofa at around 16:29 Aug. 17

A magnitude-5.7 earthquake occurred in the South Pacific Ocean southwest of Tonga at around 16:29 Aug. 17 The epicenter was about 122 km (76 miles) southwest of Houma. The tremor occurred at a depth of about 112 km (70 miles), and light shaking was probably felt throughout much of Tonga. There have been no initial reports of damage or casualties as a result of the earthquake; however, significant damage is unlikely due to the offshore nature of the quake. It could take several hours until authorities can conduct comprehensive damage assessments, especially in remote areas. Light-to-moderate 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.