Vol. 9, Issue 9, Part B (2023)

Abstract
In this study, we examine the relationship between black geomagnetic storms, CRI and Ap index at rising and falling levels. Our analysis includes the study of sun 22 and 24. We use the stacked period technique to establish a relationship between these parameters. During the analysis of two solar panels, we found a very good result where good Dst value in both phases leads to a good CRI value. Similarly, we compared the Ap index with the Dst and CRI model and found that the smallest peaks of Dst and CRI coincided with the largest peak of the Ap index.