Theory of Forbush Decrease in a Magnetic Cloud
A. Petukhova, I. Petukhov, S. Petukhov
A model of Forbush-decrease in a magnetic cloud is presented. We calculate moments of the particle distribution function depending on time. The calculated results of cosmic ray intensity generally agree with the observed ones in events registered by ground based detectors. It is found that the magnetic flux rope is of great importance in dynamics of Forbush decrease.