Dipartimento di Fisica e Astronomia"Ettore Majorana",Universitàdi Catania,Via S.Sofia 78,195123 Catania,Italy;
INAF Osservatorio Astrofisico di Catania,Via S.Sofia 78,1-95123 Catania,Italy;
INAF Osservatorio Astronomico di Roma,Via Frascati 33,1-00078 Monte Porzio Catone,Italy;
Department of Physics,Aberystwyth University,Ceredigion,Cymru,SY233BZ,UK;
Department of Astronomy,E?tv?s Loránd University,Pazmany P.setany 1/A,Budapest,H-l 117,Hungary;
Solar Physics&Space Plasma Research Center(SP2RC),School of Mathematics and Statistics,University of Sheffield,Hicks Building,Hounsfield Road,S37RH,UK;
Gyula Bay Zoltán Solar Observatory(GSO),Hungarian Solar Physics Foundation(HSPF),etofi ter 3.,Gyula,H-5700,Hungary;
Sun:magnetic fields; Sun:photosphere; Sun:sunspots; Sun:flares; Sun:activity;