The mean statistical dependence of the -index on the heliospheric parameters during the development of storms initiated by solar coronal mass ejections (CME-storms) and corotating interaction regions (CIR-storms) is analyzed. It is found that the dynamics of the -index and the β-parameter (equal to the ratio of the thermal pressure to the magnetic pressure) are qualitatively similar during the development of storms caused by CME and CIR flows. In the main phase of the CME- and CIR-storms, the mean statistical value of the β-parameter is β 1 and β 1, respectively, which manifests different plasma turbulence in the solar wind flows. It is shown that in the area of developing CME- and CIR-storm, the trajectory of variation depending on the heliosphere parameters in the main phase of storms does not coincide with its trajectory in the recovery phase. This is a typical feature of the hysteresis phenomenon. The hysteresis effect between the -index and the key parameters of the solar wind and interplanetary magnetic field (IMF) is observed during the development of both types of storms, indicating a nonlinear nature of the relationship between and heliospheric parameters. The shape and size of the hysteresis loops vary depending on the analyzed parameters. The hysteresis loops for CIR-storms are smaller in area than those for CME-storms. It is found that in the period preceding the occurrence of CME- and CIR-storms, the solar wind flows have a closed configuration of the IMF intensity vector in the ecliptic plane with different directions of the rotation.
N.A. Kurazhkovskaya (Wed,) studied this question.