Cancel HYDROPAC 4282/18 and this msg
Gulf of Alaska · Alaska · HYDROPAC 4284/18
What this record establishes
Archived notice · 2018-11-30 19:49Z
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) · NTWC 301900Z NOV 18.. Issued 2018-11-30 19:49Z. 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
- Gulf of Alaska · Alaska. No usable coordinates were parsed; a location-based nearby search is unavailable. Check the original wording for limits and qualifications.
Related notices and cancellation links
- Earthquake with magnitude of 7.2 has occurred in vicinity 61-18N 149-48W at 301729Z novcancelled by this notice
These messages are connected by recorded cancellation references. The links establish relationships between notices; they do not by themselves confirm a single object, a continuous track, or recovery.
- HYDROPAC 4282/182018-11-30 · Archived notice
- HYDROPAC 4284/18 · this notice2018-11-30 · Archived notice
- issued
- 2018-11-30 19:49Z
- status
- Archived notice
- authority
- NTWC 301900Z NOV 18.
- issued by
- NTWC
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
GULF OF ALASKA. ALASKA. DNC 25. CANCEL HYDROPAC 4282/18 AND THIS MSG. TSUNAMI WARNING CANCELED.
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.
- 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.
Nearby notices listed in force · within 120 nm
No parsed position is available for this comparison.
Worldwide in the collected sources
3 earthquake & tsunami bulletins listed in force · see all
Record snapshot 2026-10-02 17:49Z; source collection times vary.
Quakes
Undersea earthquakes of magnitude 5.5 and above (USGS) and the tsunami bulletins NAVAREA coordinators relay. All current earthquake & tsunami bulletins →
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.