# Dependence of X-ray class solar flares distribution on the solar magnetic activity: A statistical approach.

Foldes R., Plutino N., Berrilli F., Del Moro D.

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IV - Geofisica e fisica dell'ambiente
GSSI Ex ISEF - Aula D - Lunedì 23 h 15:00 - 19:00
Solar flares have a particular interest in space weather since they can drive charged plasma into the heliosphere causing various geomagnetic effects. This work is the widest statistical analysis on official GOES flares catalogue, which includes solar flares from 1975 to 2017. Considering 3 proxies, that suggest the phase of magnetic activity (SSN, 10.7 cm flux, MgII index), and dividing flares into 3 bands (minimum, medimum and maximum, it was impossible to observe a significant change of $\alpha$ between the 3 different bands, but its trend results slightly steeper during an active period than for a quiet period of the Sun.