Auf     http://www.spaceweather.com    finden sich alle relevanten Daten
der Sonnenaktivitäten.

( Solarwind, 10,7cm Flux, xray Solar Flares, Sonnenflecken usw )

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Begriffsbestimmungen Xray Solar Flares:

Class       Peak (W/m²) between 1 and 8 Angstroms

B              I < 10⁻⁶
C             10⁻⁶ < = I < 10⁻⁵
M             10⁻⁵ < = I < 10⁻⁴
X              I > = 10⁻⁴

Each category for x-ray flares has nine subdivisions ranging
from 1 to 9

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