Volcanic

Nga chart 76030 (9TH ed)

South Pacific Ocean · HYDROPAC 1482/11

What this record establishes

Archived notice · 2011-06-25 09:12Z

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 XIV 54/11 172253Z MAY 11.. Issued 2011-05-17 23:29Z. 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 -25.883, -177.183. It is a position in the source message, not a live location. Check the original wording for limits and qualifications.

Current notices and reporting history in the South Pacific Ocean →

issued: 2011-05-17 23:29Z
status: Archived notice
authority: NAVAREA XIV 54/11 172253Z MAY 11.
NAVAREA: NAVAREA XIV · named as the source of this relay
sea: South Pacific Ocean
position: -25.883, -177.183
source: NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

SOUTH PACIFIC.
NGA CHART 76030 (9TH ED).
UNDERWATER VOLCANIC ACTIVITY, DISCOLORED WATER
AND POSSIBLE GAS AT SEA SURFACE REPORTED
VICINITY 25-53S 177-11W AT 172045Z MAY.

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.
Discoloured water: Patches of unusually coloured sea — often a sign of a submarine volcano or of a shoal.
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.

All warning terms →

Collected reports in this area · volcanic activity

8 within 180 nm since 2009 · 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 reported vicinity 25-53S 177-11W2015-10-16
Volcanic activity reported vicinity 25-53S 177-11W2015-03-09
Volcanic activity reported vicinity 25-53S 177-11W2015-01-12
South Pacific2013-09-16
Kermadec Islands2012-08-06
Nga chart 76030 (9TH ed)2009-10-31

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 2026-10-01 18:46Z; 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.