Behavior of Plasma and Field Parameters and their Relationship with Geomagnetic Indices during Intense Geomagnetic Storms of Solar Cycle 23

TL;DR

This study analyzes the relationship between plasma and magnetic field parameters and geomagnetic indices during intense storms in Solar Cycle 23, revealing timing correlations and solar sources of geomagnetic storms.

Contribution

It provides a detailed correlation and lag/lead analysis between plasma parameters, geomagnetic indices, and solar sources during Solar Cycle 23's intense geomagnetic storms.

Findings

Peak lag/lead times within +/-10 hours.

GMSs linked to large flares and halo CMEs.

Correlation patterns vary across storm phases.

Abstract

A correlative study between the geomagnetic indices and the peak values of various plasma and field parameters during rising, maximum and decay phases as well as during complete solar cycle 23 have been presented. We have also presented the lag/lead analysis between the maximum of Dst and peak values of plasma and field parameters and found that peak values of lag/lead time lies in the +/-10 hr interval. Three geomagnetic storms (GMSs) and associated solar sources observed during these phases of this solar cycle have also been studied and found that GMSs are associated with large flares and halo CMEs.