Discolored water with submarine volcanic activity reported in 24-17.3N 141-28.6E at 200410Z jul
Philippine Sea · HYDROPAC 1154/05
What this record establishes
Archived notice · 2005-12-09 14:22Z
This notice comes from the historical archive. Its archived status does not establish when or how the reported situation ended.
- Source and dates
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · NAVAREA XI 348/05 20 JUL 05.. Issued 2005-07-20 07:17Z. First collected 2026-08-17 13:38Z; last seen in collection 2026-08-17 15:46Z. Collection dates record ingestion, not a new incident or a fresh field observation.
- Location covered
- Philippine Sea. The parsed report position is 24.288, 141.477. 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
- Discolored water with submarine volcanic activity reported in 24-17.4N 141-29.1E at 050400Z julcancelled by this notice
- Cancel HYDROPAC 1319/05(63), HYDROPAC 1234/05 referslater 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.
- HYDROPAC 1047/052005-07-02 · Archived notice
- HYDROPAC 1050/052005-07-03 · Archived notice
- HYDROPAC 1059/052005-07-05 · Archived notice
- HYDROPAC 1154/05 · this notice2005-07-20 · Archived notice
- HYDROPAC 2120/052005-12-12 · Archived notice
- HYDROPAC 1/062006-01-02 · Archived notice
Current notices and reporting history in the Philippine Sea →
- issued
- 2005-07-20 07:17Z
- status
- Archived notice
- authority
- NAVAREA XI 348/05 20 JUL 05.
- NAVAREA
- NAVAREA XI · named as the source of this relay
- sea
- Philippine Sea
- position
- 24.288, 141.477
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
CHART 510 (3RD ED). 1. DISCOLORED WATER WITH SUBMARINE VOLCANIC ACTIVITY REPORTED IN 24-17.3N 141-28.6E AT 200410Z JUL. 2. CANCEL HYDROPAC 1059/05.
Reading this warning
- Chart reference
- The number of the nautical chart on which the reported position lies.
- Discoloured water
- Patches of unusually coloured sea — often a sign of a submarine volcano or of a shoal.
- Volcanic activity
- An erupting or restless volcano near or under the sea, with a keep-clear radius around it.
- 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.
- Cancellation reference
- A line that cancels an earlier warning by its number, such as CANCEL HYDROLANT 1085/12.
- HYDROPAC
- The U.S. long-range warning series for the Pacific outside NAVAREA XII and for the Indian Ocean, Persian Gulf and adjoining seas.
Collected reports in this area · volcanic activity
59 within 180 nm since 1996 · 0 in the last 12 months · 5 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 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
- Volcanic activity reported in area within 400 meters of 24-45.44N 141-19.60E at 100428Z nov2023-11-10
- 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
- Discoloured water observed in vicinity of 25-27.1N 141-14.5E at 140425Z 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
- Discoloured water observed in vicinity of 24-17.2N 141-28.8E at 140350Z junVolcanic · 0.2 nm
- Volcanic activity reported at io-to in vicinty of 24-45.00N 141-17.3EVolcanic · 29.6 nm
- Discoloured water observed in vicinity of 24-48.8N 141-19.2E at 130800Z julVolcanic · 32.7 nm
- Discoloured water observed in vicinity of 25-27.1N 141-14.5E at 140425Z junVolcanic · 71 nm
Worldwide in the collected sources
12 volcanic activity listed in force · see all
Record snapshot 2026-10-01 23:32Z; 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.