Scientific or monitoring agency · United States

NOAA Space Weather Prediction Center

Recorded as: NOAA SWPC

Space weather alerts. Geomagnetic storms and solar radio events can disturb HF radio and degrade satellite navigation at sea.

Scientific and monitoring agencies issue warnings about their own work at sea — research vessels, moorings and seafloor instruments — or relay alerts about natural hazards such as tsunamis and space weather that affect ships.

What the archive holds

42 messages in this archive record NOAA SWPC as their authority, issued from 2023-03-24 to 2024-05-10. None of them is in force in the latest lists we collected.

Nav aids accounts for 42 of 42 recorded messages (100%), the largest warning type group in this selection.

Attributed to NAVAREAs, they fall mostly in NAVAREA IV (13) and NAVAREA XII (13).

They reached this archive through NAVAREA XII (13), NAVAREA IV (13), HYDROARC (12) and HYDROLANT (2).

By month of issue, all years

Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Warning types

Where

NAVAREA IV 13 · NAVAREA XII 13

Most recently issued

  1. HYDROARC 73/24 · Nav aids2024-05-09
    Due to space weather, hf communications and GPS positional information may be disrupted by the effects of…
  2. NAVAREA XII 322/24 · Nav aids2024-05-09
    Due to space weather, hf communications and GPS positional information may be disrupted by the effects of…
  3. NAVAREA IV 524/24 · Nav aids2024-05-09
    Due to space weather, hf communications and GPS positional information may be disrupted by the effects of…
  4. HYDROPAC 1462/24 · Nav aids2024-05-02
    Due to space weather, hf communications and GPS positional information may be disrupted by the effects of…
  5. HYDROLANT 941/24 · Nav aids2024-05-02
    Due to space weather, hf communications and GPS positional information may be disrupted by the effects of…
  6. NAVAREA XII 299/24 · Nav aids2024-05-02
    Due to space weather, hf communications and GPS positional information may be disrupted by the effects of…
  7. NAVAREA IV 494/24 · Nav aids2024-05-02
    Due to space weather, hf communications and GPS positional information may be disrupted by the effects of…
  8. HYDROARC 66/24 · Nav aids2024-05-02
    Due to space weather, hf communications and GPS positional information may be disrupted by the effects of…

Earliest in the archive

  1. NAVAREA IV 331/23 · Nav aids2023-03-23
    Due to space weather, hf communications and GNSS positional information may be disrupted by the effects of…

Other scientific or monitoring agencys in NAVAREA IV

Counts are messages recording this issuer as their authority, recounted 2026-09-24; see coverage for what is collected. Not for navigation.