elenco flares classe x del ciclo solare 24
X-flares of Solar Cycle 24:
Feb. 15, 2011 (X2),
March 9, 2011 (X1),
Aug. 9, 2011 (X7).
Before these three, the previous X-flare occured on Dec.14, 2006, (X1) during old Solar Cycle 23.
gianni maltoni
SOCIO C.U.N. romagna
