Tsunami warning
South Pacific Ocean · HYDROPAC 2965/11
What this record establishes
Archived notice · 2011-10-22 09:36Z
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) · PTWC 211844Z OCT 11.. Issued 2011-10-21 19:54Z. 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
- South Pacific Ocean. The parsed report position is -28.900, -176.000. 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.
- USGS-USP000J9NM2011-10-21 · Cancelled notice
- HYDROPAC 2965/11 · this notice2011-10-21 · Archived notice
Current notices and reporting history in the South Pacific Ocean →
- issued
- 2011-10-21 19:54Z
- status
- Archived notice
- authority
- PTWC 211844Z OCT 11.
- issued by
- PTWC
- sea
- South Pacific Ocean
- position
- -28.900, -176.000
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
WESTERN SOUTH PACIFIC. KERMADEC ISLANDS. TSUNAMI WARNING. AND EARTHQUAKE HAS OCCURRED AT 211757Z OCT WITH A PRELIMINARY MAGNITUDE OF 7.4 VICINITY 28-54S 176-00W. A TSUNAMI HAS BEEN GENERATED. TSUNAMI WAVE HEIGHTS CANNOT BE PREDICTED AND MAY BE A SERIES OF WAVES WHICH COULD BE DANGEROUS FOR SEVERAL HOURS AFTER INITIAL WAVE ARRIVAL. VESSELS IN VICINITY ARE ADVISED TO USE CAUTION.
Reading this warning
- 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.
- 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.
Collected reports in this area · earthquake & tsunami bulletins
335 within 180 nm since 1997 · 11 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.
- Earthquake magnitude 5.5 (mww) in 27.858S 177.229W, depth 94 km at 182318Z sep 262026-09-18
- Earthquake magnitude 5.5 (mww) in 30.168S 177.884W, depth 29 km at 300902Z aug 262026-08-30
- Earthquake magnitude 5.6 (mww) in 28.793S 176.333W, depth 10 km at 131611Z aug 262026-08-13
- Earthquake magnitude 5.6 (mb) in 28.782S 176.450W, depth 10 km at 300508Z jul 262026-07-30
- Earthquake magnitude 5.8 (mww) in 28.584S 176.637W, depth 10 km at 300508Z jul 262026-07-30
- Earthquake magnitude 5.9 (mww) in 28.409S 176.660W, depth 14 km at 292227Z jul 262026-07-29
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
3 earthquake & tsunami bulletins listed in force · see all
Record snapshot 2026-10-02 12:22Z; 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.