Modeling and Comparison of Two Geomagnetic Storm

Publication date: Available online 12 November 2019Source: Advances in Space ResearchAuthor(s): Samed InyurtAbstractThis paper is on the investigation and comparison of two consecutive geomagnetic storms in the 24th solar cycle. The first storm is a moderate (Dst=-50 nT) storm occurred on 22.04.2017, while the second is an intense (Dst=-125 nT) storm happened on 28.05.2017. The comparison was carried out based on solar wind (Bz, E, P, N, v, T) and zonal geomagnetic indices (Dst, ap, AE). Mathematical analysis is introduced to the reader with a data set of 9 variables obtained from NASA's observations. The descriptive statistics, demonstrating the power of binary relations with a covariance matrix, hierarchical clustering with a dendrogram, and factor analysis pointing to three separate eigenvectors are the headstone of the discussion. Considering the results, linear models of zonal geomagnetic indices caused by solar parameters are discussed governing the causality principle. Finally, the study ends with a nonlinear model which includes solar wind pressure (P), proton density (N) and ap index. In all analysis, the causality principle is obeyed rigidly and the mathematical models are discussed with the cause-effect relationship.

Source: Advances in Space Research - November 14, 2019 Category: Science Source Type: research