ИСТИНА

Interplanetary coronal mass ejections (ICMEs) are the most geoeffective solar wind (SW) transients produced by spontaneous solar activity. Investigation of relationship between properties of coronal sources and types and parameters of ICMEs is important for overall modeling of ICMEs and forecasting of their geoefficiency. Commonly, identification of coronal origins of ICMEs is based on kinematical and magnetic properties of SW transients, such as enhanced magnetic field strength, declining velocity profile and depressed proton temperature, but due to unknown evolution of these parameters in the corona and heliosphere, the result often is ambiguous. In addition to ordinarily considered empirical relations (flare/CME/ICME), for identification of the ICME coronal sources it is promising to use a physical relationship between the measured “in situ” ion composition of SW transients and ionization state of the coronal plasma in the supposed activity events. In the report, we present a statistical analysis of the ICME parameters identified in 24th solar cycle, properties of their probable coronal sources containing in various databases (ISEST database list, Demon and CACTUS databases, etc.) and consider a relationship between plasma parameters in the source and ion composition of ICME. The results obtained for 24th cycle are compared with those established earlier for the preceding cycles at different levels of solar activity