Volcanic activity is reported in the Philippine Sea within 400 meters of 24-45.44N 141-19.60E at 04:28 UTC on November 10.
Philippine Sea · HYDROPAC 3542/23
What this record establishes
Cancelled notice · 2026-08-14 18:10Z
This notice disappeared from the issuing source's in-force list. No explicit recovery or all-clear is established by that removal.
- Source and dates
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · NAVAREA XI 387/23 100901Z NOV 23.. Issued 2023-11-10 10:03Z. First collected 2026-08-17 13:41Z; last seen in collection 2026-08-17 15:50Z. Collection dates record ingestion, not a new incident or a fresh field observation.
- Location covered
- Philippine Sea. The parsed report position is 24.757, 141.327 with a 0.2 nm radius. It is a position in the source message, not a live location. Check the original wording for limits and qualifications.
Related notices and cancellation links
- Volcanic activity reported in area within 400 meters of 24-45.44N 141-19.60Elater cancellation notice
These reports were linked by category and sea, with positions within 30 nautical miles and issue dates within 30 days of another report's recorded in-force span. Links can extend through other members, so the full group can cover a larger area or period. Proximity does not confirm that they describe one incident.
- NAVAREA XI 231/212021-07-13 · Listed in force
- HYDROPAC 2027/212021-07-13 · Cancelled notice
- NAVAREA XI 207/232023-06-14 · Listed in force
- HYDROPAC 3542/23 · this notice2023-11-10 · Cancelled notice
- HYDROPAC 3334/242024-10-23 · Cancelled notice
- HYDROPAC 2242/252025-09-02 · Listed in force
Current notices and reporting history in the Philippine Sea →
- issued
- 2023-11-10 10:03Z
- status
- Cancelled notice
- authority
- NAVAREA XI 387/23 100901Z NOV 23.
- NAVAREA
- NAVAREA XI · named as the source of this relay
- sea
- Philippine Sea
- position
- 24.757, 141.327 · r 0.2 nm
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:41Z
Original warning text
PHILIPPINE SEA. JAPAN. DNC 12. VOLCANIC ACTIVITY REPORTED IN AREA WITHIN 400 METERS OF 24-45.44N 141-19.60E AT 100428Z NOV.
Reading this warning
- DNC (Digital Nautical Chart)
- A reference to one of the regions of NGA's Digital Nautical Chart, used to tell the reader which charts a warning affects.
- Volcanic activity
- An erupting or restless volcano near or under the sea, with a keep-clear radius around it.
- Within a radius of
- A circular area — every position within a stated distance of a point.
- Position (degrees and minutes)
- How warnings write positions: degrees, a hyphen, then minutes, with N/S and E/W — 49-40.8N 003-43.8W.
- Date-time group (DTG)
- A compact UTC timestamp — day, hour and minute followed by Z — such as 201500Z for the 20th at 15:00 UTC.
Collected reports in this area · volcanic activity
88 within 180 nm since 1996 · 2 in the last 12 months · 7 listed in force now
Counts include repeat notices about the same situation. NGA archive coverage ends 2024-05; live collection began 2026-08-17. The period between them is incomplete. An empty year is not evidence that no hazards occurred.
- Volcanic activity reported in area within one mile of 27-14.60N 140-52.70E at 080200Z sep2026-09-08
- 080200UTC issued at 080200UTC sep 2026 volcanic warning volcano name:nishino shima LOCATION:27-14.6N…2026-09-08
- Volcanic activity reported at io-to in vicinty of 24-45.00N 141-17.3E2025-09-02
- Volcanic activity reported in area within 400 meters of 24-45.44N 141-19.60E2024-10-23
- Discolored water reported in vicinity 25-27.10N 141-14.50E at 140425Z jun2023-06-14
- Discoloured water observed in vicinity of 24-17.2N 141-28.8E at 140350Z jun2023-06-14
Month of issue in the collected archive
All available years combined. Uneven collection and repeat bulletins affect these counts; this chart does not measure the seasonality or probability of incidents.
Nearby notices listed in force · within 120 nm
- Volcanic activity reported at io-to in vicinty of 24-45.00N 141-17.3EVolcanic · 2.1 nm
- Discoloured water observed in vicinity of 24-48.8N 141-19.2E at 130800Z julVolcanic · 3.4 nm
- Discoloured water observed in vicinity of 24-17.2N 141-28.8E at 140350Z junVolcanic · 29.5 nm
- Discoloured water observed in vicinity of 25-27.1N 141-14.5E at 140425Z junVolcanic · 41.9 nm
Worldwide in the collected sources
12 volcanic activity listed in force · see all
Record snapshot 2026-09-27 19:51Z; 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.