Forbush orbush-effects with sudden and gradual storm co commencement mencement

摘要

For overall studying of the Forbush Forbush-effects (FEs) database of transient phenomena in the cosmic rays and interplanetary space was created and is continuously updat updating ing. Various dependences of the FE size on the internal and . external characteristics were examined and different groups of events were distinguished. Both recurrent ( co corotation rotation of the high speed streams from the coronal holes) and sporadic ( CMEs CMEs) events have been considered. ) The groups of events beginning with the Sudden Storm Commencement (SSC SSC), and without shock ), shocks are allocated and studied. It is shown that derived FE magnitude dependence dependences (on the interplanetary disturbance nterplanetary parameters, on the indices of ge geo- omagnetic activity etc.) are significantly different for these groups. Most likely these d magnetic differences are caused by pred ifferences predo- ominance of different kind of sources of the solar wind disturbance ( minance CME CMEs or the coronal holes) in s separated groups.