DETAILED ANALYSIS OF THE BEHAVIOR OF THE F2-LAYER CRITICAL FREQUENCY PRIOR TO MAGNETIC STORMS. 7. SEPARATION OF THE EFFECTS OF STORM INTENSITY AND SOLAR ACTIVITY (SLOUGH STATION)
A detailed analysis of the dependence of the number of events (deviations of the foF 2 critical frequency on the prestorm days from quiet geomagnetic conditions) on the intensity of the coming storm and solar activity according to the measurements at Slough station is performed. In order to separate the effects of the dependence on different parameters, the dependence on solar activity is considered for narrow intervals of the Dst index that characterizes the storm intensity, whereas the dependence on the storm intensity is analyzed for narrow intervals of the F 10.7 index that characterizes solar activity. At the same time, if there is sufficient amount of the data, the dependencies for the winter and equinox conditions are considered separately. For the vast majority of situations, the dependencies (decreases) of the number of events both on Dst and F 10.7, obtained in the previous publications of this series at consideration of the entire massif of storms are obtained. The results of a comparison with the similar study for Juliusruh station published in the previous work of the authors are presented.