Cosmic-ray modulation and long-duration solar flare events

Research paper by K. Kudela, A. Antalová, D. Venkatesan, J. Rybák

Indexed on: 01 Oct '94Published on: 01 Oct '94Published in: Solar Physics


The correlation between the long-term intensity variations of cosmic rays at neutron monitor energies and the LDE index measure of solar flares with long-lasting soft X-ray emissions is reported. Three subsequent solar cycles, 20–22, are taken into account and half-monthly data are analyzed. Possible explanation of this correlation is discussed in terms of the recent concepts of cosmic-ray modulation, in particular with merged interaction regions affecting the cosmic-ray intensity.