Volcanic

Volcanic activity in vicinity of la palma island

North Atlantic Ocean · HYDROLANT 2413/21

What this record establishes

Archived notice · 2021-12-29 13:41Z

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 361/21 270211Z SEP 21.. Issued 2021-09-27 02:59Z. 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 map shows an area described by the warning; the listed coordinate is its representative center. 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.

  1. HYDROLANT 2369/212021-09-21 · Archived notice
  2. HYDROLANT 2413/21 · this notice2021-09-27 · Archived notice
  3. HYDROLANT 3189/212021-12-29 · Archived notice
Compare all 3 notices, changes and original texts →

Current notices and reporting history in the North Atlantic Ocean →

issued
2021-09-27 02:59Z
status
Archived notice
authority
NAVAREA II 361/21 270211Z SEP 21.
NAVAREA
NAVAREA II · named as the source of this relay
sea
North Atlantic Ocean
position
28.609, -17.947
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.
DNC 01.
1. VOLCANIC ACTIVITY IN VICINITY OF LA PALMA
   ISLAND. VESSELS TO AVOID AREA BOUND BY
   28-35.3N 017-55.0W, 28-38.0N 017-56.1W
   28-38.0N 017-58.1W, 28-35.3N 017-58.1W.
   VESSELS REQUESTED TO TRANSIT WEST OF 017-58.1W.
2. CANCEL HYDROLANT 2369/21.

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.
Volcanic activity
An erupting or restless volcano near or under the sea, with a keep-clear radius around it.
Area bound by
Introduces a list of positions that are the corners of an area — the polygon the warning applies to.
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.
Cancellation reference
A line that cancels an earlier warning by its number, such as CANCEL HYDROLANT 1085/12.
HYDROLANT
The U.S. long-range warning series for Atlantic waters outside NAVAREA IV, including the eastern Atlantic, the Mediterranean and adjoining seas.

All warning terms →

Collected reports in this area · volcanic activity

4 within 180 nm since 2011 · 0 in the last 12 months · 0 listed in force now

11
15
20
21

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

J
F
M
A
M
J
J
A
S
O
N
D

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 19:49Z; 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.