Volcanic · Natural Phenomenon

A volcanic eruption continues at Io To in the Nanpo Shoto, North Pacific. Vessels are advised to be cautious. Cancellation of warning 0539/24.

North Pacific, Nanpo Shoto · Io To · NAVAREA XI 412/25

issued: 2025-09-02 09:00Z
status: in force
cancels: NAVAREA XI 539/24
authority: Japan Coast Guard (JHOD)
source: jhod · first seen 2026-08-17 13:42Z

Original warning text

NORTH PACIFIC, NANPO SHOTO.
IO TO. VOLCANIC ERUPTION CONTINUE.
VESSELS REQUESTED TO BE CAUTION ADVISED.
CANCEL 0539/24.

Nearby now · within 120 nm

Nothing else in force within 120 nm.

Worldwide now

12 volcanic activity in force · see all

Volcanic

Submarine eruptions, discoloured water, pumice rafts. All current volcanic activity →

Not for navigation. This is a re-rendering of an official navigational warning for awareness; mariners must use official NAVAREA broadcasts and their national MSI service.