Nga chart 51260 (4TH ed)
North Atlantic Ocean · HYDROLANT 1669/11
What this record establishes
Archived notice · 2011-10-29 09:05Z
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 II 356/11 101630Z OCT 11.. Issued 2011-10-10 16:49Z. 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
- North Atlantic Ocean. The parsed report position is 27.570, -18.000. 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
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.
- HYDROLANT 1669/11 · this notice2011-10-10 · Archived notice
- HYDROLANT 1863/112011-11-08 · Archived notice
Current notices and reporting history in the North Atlantic Ocean →
- issued
- 2011-10-10 16:49Z
- status
- Archived notice
- authority
- NAVAREA II 356/11 101630Z OCT 11.
- NAVAREA
- NAVAREA II · named as the source of this relay
- sea
- North Atlantic Ocean
- position
- 27.570, -18.000
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
EASTERN NORTH ATLANTIC. CANARY ISLANDS. NGA CHART 51260 (4TH ED). VOLCANIC ACTIVITY REPORTED VICINITY 27-34.2N 018-00.0W AT 101100Z OCT.
Reading this warning
- Chart reference
- The number of the nautical chart on which the reported position lies.
- 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.
Collected reports in this area · volcanic activity
4 within 180 nm since 2011 · 0 in the last 12 months · 0 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 in vicinity of la palma island2021-09-27
- Volcanic activity in vicinity of la palma island2021-09-21
- Nga chart 51260 (4TH ed)2011-11-08
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
No other collected notice is currently listed in force within this radius. This does not establish safe conditions.
Worldwide in the collected sources
12 volcanic activity listed in force · see all
Record snapshot 2026-10-02 04:38Z; 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.