Japan: Magnitude-6.1 offshore earthquake occurs in North Pacific Ocean near the Izu Islands region at around 10:59 Oct. 5 /update 1

Event

A magnitude-6.1 earthquake occurred in the North Pacific Ocean near the Izu Islands region at 10:59 Oct. 5. The epicenter was about 532 km (330 miles) south of Shimoda, Shizuoka Prefecture. The tremor occurred at a depth of about 10 km (6 miles), and light shaking was probably felt throughout parts of the Izu Islands. There have been no initial reports of damage or casualties. It could take several hours until authorities can conduct comprehensive damage assessments, especially in remote areas. Aftershocks are likely over the coming days. The Japan Meteorological Agency rescinded a tsunami advisory for the Izu Islands the afternoon of Oct. 5. Local sources indicate a tsunami of 30 cm (12 inches) reached Hachijojima and Yaene in the Izu Islands; there were no reports of damage or casualties.

Tokai Kisen suspended ferries to Shikinejima and Kozushima due to the tsunami advisory. Tokyo Bay Ferry temporarily halted the ferry from Kanaya Port in Futtsu City, Chiba Prefecture, to Kurihama Port in Yokosuka City, Kanagawa Prefecture; services have resumed.

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 there is no notable damage. Utility outages are possible, particularly near the earthquake's epicenter.

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.