Volcanic activity in 2025

Submarine eruptions, discoloured water, pumice rafts.

issued in 2025
2
still in force
2
vs 2024
-50%
first · last
09-02 · 09-02

Coverage note: the NGA archive ends 2024-05 and live collection began 2026-08-17. Warnings issued in between are here only if they were still in force when collection started, so this year is under-counted.

By month

J
F
M
A
M
J
J
A
S
O
N
D

By NAVAREA series

  • HYDROPAC1
  • NAVAREA XI1

Where · top seas

Philippine Sea1100%

All volcanic activity issued in 2025 · 2

  1. HYDROPAC 2242/25in force2025-09-02
    Volcanic activity is reported at Io-To in vicinity of 24-45.00N 141-17.3E.
    North Pacific · Philippine Sea · Japan
  2. NAVAREA XI 412/25in force2025-09-02
    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

Sea boundaries: Flanders Marine Institute (2018), IHO Sea Areas v3, marineregions.org (CC BY 4.0). Not for navigation — follow official NAVAREA / coastal broadcasts and your national MSI service.

Volcanic activity in 2025 · seahazards