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

What this record establishes

Listed in force

The latest collected record lists this warning as active. This is the status of the notice, not a live observation of conditions at the location.

Source and dates: Japan Coast Guard JHOD NAVAREA XI · Japan Coast Guard (JHOD). Issued 2025-09-02 09:00Z. First collected 2026-08-17 13:42Z; last seen in collection 2026-08-17 14:24Z. Collection dates record ingestion, not a new incident or a fresh field observation.
Location covered: North Pacific, Nanpo Shoto · Io To. No usable coordinates were parsed; a location-based nearby search is unavailable. Check the original wording for limits and qualifications.

issued: 2025-09-02 09:00Z
status: Listed in force
authority: Japan Coast Guard (JHOD)
NAVAREA: NAVAREA XI
issued by: JAPAN COAST GUARD
source: Japan Coast Guard JHOD NAVAREA XI · 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.

Reading this warning

Volcanic activity: An erupting or restless volcano near or under the sea, with a keep-clear radius around it.

All warning terms →

Nearby notices listed in force · within 120 nm

No parsed position is available for this comparison.

Worldwide in the collected sources

12 volcanic activity listed in force · see all

Record snapshot 2026-09-25 09:19Z; source collection times vary.

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.