Volcanic

Volcanic activity reported in 02-46.01N 009-46.35E

Gulf of Guinea · HYDROLANT 793/17

What this record establishes

Archived notice · 2018-09-07 10:37Z

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 86/17 101735Z MAR 17.. Issued 2017-03-10 17:37Z. 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 Guinea. The parsed report position is 2.767, 9.773. 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 Gulf of Guinea →

issued: 2017-03-10 17:37Z
status: Archived notice
authority: NAVAREA II 86/17 101735Z MAR 17.
NAVAREA: NAVAREA II · named as the source of this relay
sea: Gulf of Guinea
position: 2.767, 9.773
source: NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

GULF OF GUINEA.
CAMEROON.
DNC 01.
CHART 57160, 57170.
VOLCANIC ACTIVITY REPORTED IN 02-46.01N 009-46.35E.

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.
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.

All warning terms →

Collected reports in this area · volcanic activity

1 within 180 nm since 2017 · 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.

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 2026-10-04 01:17Z; 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.