SOFT X-RAY FLARES FOR THE PERIOD 1975―2000

摘要

Statistical aspects of solar soft X-ray (SXR) flares for the period September 1975 to December 2000 are investigated. In particular, we analyzed the spatial distribution of SXR flares with regard to the solar hemispheres, i.e. N-S and E-W asymmetries, as well as the occurrence of SXR flares in the course of the solar cycle. We obtain that the occurrence rate of SXR flares is delayed in relation to the Sunspot Numbers which can be interpreted as an interaction between the northern and southern hemisphere activity.