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Conditions solaires et de bande
Meteo spatiale en temps reel pour la planification de propagation HF.
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Good HF Conditions
Low geomagnetic disturbance, strong solar flux. Most HF bands should be open.
201
Flux solaire (SFI) Plus eleve = meilleure propagation NOAA: 116 10.7 cm radio emission from the Sun. Above 100 means good ionospheric support for HF. Below 70, higher bands (15m, 10m) may not open.
2
Indice K Plus bas = plus calme = mieux 3-hour geomagnetic disturbance index (0-9). K ≤ 2 is quiet, K 3-4 is unsettled, K ≥ 5 means a geomagnetic storm that can black out HF.
146
Taches solaires (SSN) Plus = plus d'ionisation Daily sunspot count. Tracks the 11-year solar cycle. More sunspots produce more UV, strengthening the ionosphere for HF.
Conditions des bandes HF
80m-40m
☀ Poor ☽ Good
30m-20m
☀ Good ☽ Good
17m-15m
☀ Good ☽ Good
12m-10m
☀ Good ☽ Poor
Plus de donnees solaires
C4.0 Flux de rayons X Solar X-ray class (A/B/C/M/X). M-class or higher flares cause shortwave fadeouts on the sunlit side of Earth.
17 Indice A Daily average of 3-hour K values. A ≤ 7 is quiet, A 8-15 unsettled, A ≥ 30 is a storm.
412 km/s Vent solaire Speed of charged particles from the Sun. Normal is 300-400 km/s. Above 500 km/s can enhance aurora and disturb HF.
11.2 nT Champ magnetique (Bz) North-south component of the interplanetary magnetic field. Bz south (negative) lets solar wind energy enter Earth's magnetosphere, causing storms.
QUIET Champ geomagnetique Overall geomagnetic field state (quiet/unsettled/active/storm).
S1-S2 Bruit de signal Background noise level affecting weak signal reception.
1 Aurore Auroral activity index. Higher values may enable VHF aurora scatter but disrupt HF polar paths.
254 Flux de protons High-energy protons from solar events. Elevated levels cause polar cap absorption (PCA), blocking HF over polar routes.
1790 Flux d'electrons High-energy electron flux in the radiation belts.
122.9 Raie de l'helium 10830 Angstrom absorption. Indicates coronal hole activity that can produce high-speed solar wind streams.
Conditions VHF
Phenomenes de propagation VHF detectes par les stations de surveillance. Ils affectent le 6m, 2m et 70cm.
Band Closed vhf-aurora (northern hemi)
Band Closed E-Skip (europe)
Band Closed E-Skip (north america)
Band Closed E-Skip (europe 6m)
Band Closed E-Skip (europe 4m)
Updated: 01 Jul 2026 2239 GMT Sources : N0NBH / hamqsl.comNOAA SWPC