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Radio Propagation

Solar-terrestrial indices

Indices from the U.S. NOAA Space Weather Prediction Center in Boulder Colorado, updated every three hours and published here in real time:

Solar-terrestrial indices for 23 July follow. Solar flux 176 and estimated planetary A-index 5. The estimated planetary K-index at 1200 UTC on 24 July was 2.00. Space weather for the past 24 hours has been minor. Solar radiation storms reaching the S1 level occurred. Radio blackouts reaching the R1 level occurred. Space weather for the next 24 hours is predicted to be moderate. Geomagnetic storms reaching the G2 level are likely. Radio blackouts reaching the R1 level are likely.

What does this mean for AM DXers?

Web resources

Current situation:
  Space weather (SWPC)
  Space weather dashboard (SWPC)
  DST Index
(Kyoto) (see also DST FAQ by AER)
  DCX index (Oulu University)
  K index
(SWPC)
  K index Norway (Tromsø)
  K index Germany (GFZ)
  K index Australia (BOM)
  Solar activity data (Solen.info)
  Space weather (spaceweather.com)
  Space weather (solarham.net)
  Auroras and Space weather Finland (FMI)
  Space weather Canada (NRCan)
  GOES proton flux (SWPC)

Forecasts:
  3-day forecast (SWPC)
  27-day forecast (SWPC)
  45-day forecast (USAF)
  Space weather forecast (Japan)

Long-term data (solar cycle history):
  Solar cycle progression (SWPC)
  Solar cycle sunspots (SIDC)

Forecast: A-Index & flux

45-DAY AP FORECAST 24Jul24 030 25Jul24 012 26Jul24 005 27Jul24 023 28Jul24 008 29Jul24 005 30Jul24 005 31Jul24 005 01Aug24 005 02Aug24 005 03Aug24 005 04Aug24 005 05Aug24 005 06Aug24 005 07Aug24 005 08Aug24 005 09Aug24 005 10Aug24 005 11Aug24 005 12Aug24 005 13Aug24 005 14Aug24 005 15Aug24 008 16Aug24 008 17Aug24 005 18Aug24 005 19Aug24 005 20Aug24 005 21Aug24 005 22Aug24 005 23Aug24 005 24Aug24 005 25Aug24 005 26Aug24 005 27Aug24 005 28Aug24 005 29Aug24 005 30Aug24 005 31Aug24 005 01Sep24 005 02Sep24 005 03Sep24 005 04Sep24 005 05Sep24 005 06Sep24 005 45-DAY F10.7 CM FLUX FORECAST 24Jul24 180 25Jul24 182 26Jul24 180 27Jul24 175 28Jul24 175 29Jul24 175 30Jul24 170 31Jul24 170 01Aug24 165 02Aug24 165 03Aug24 170 04Aug24 180 05Aug24 190 06Aug24 200 07Aug24 200 08Aug24 200 09Aug24 200 10Aug24 200 11Aug24 200 12Aug24 230 13Aug24 230 14Aug24 230 15Aug24 210 16Aug24 200 17Aug24 200 18Aug24 200 19Aug24 195 20Aug24 185 21Aug24 180 22Aug24 180 23Aug24 180 24Aug24 175 25Aug24 170 26Aug24 170 27Aug24 170 28Aug24 165 29Aug24 165 30Aug24 170 31Aug24 170 01Sep24 180 02Sep24 190 03Sep24 200 04Sep24 200 05Sep24 200 06Sep24 200 FORECASTER: Martin / Gates 99999 NNNN


Source: NOAA Space Weather
Prediction Center

 

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