Hf communications and GNSS positional information may be disrupted by the effects of solar flares

issued

2012-07-02 20:48Z

status

cancelled 2012-07-03 00:00Z (archive)

authority

SWPC SOLAR STORM ALERT 022025Z JUL 12.

source

nga_json · first seen 2026-08-17 13:38Z

SPACE WEATHER.
1. HF COMMUNICATIONS AND GNSS POSITIONAL INFORMATION
   MAY BE DISRUPTED BY THE EFFECTS OF SOLAR FLARES.
2. DURING INCIDENTS AT SEA, MARINERS SHOULD CHECK THEIR
   POSITION USING ALL ALTERNATE MEANS AVAILABLE.
3. CANCEL THIS MSG 03 JUL.

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.