Solar and Interplanetary Sources of Moderate Geomagnetic Storms During Solar Cycle 23 and 24


A.C. Pandey
Govt. New Science College Rewa, Madhya Pradesh, India.
Archana Shukla, Dinesh Kumar Pathak, A. P. Mishra
Department of Physics, A. P. S. University, Rewa Madhya Pradesh, India.
Sham Singh
Department of Applied Sciences, Chandigarh Engineering College, Landran, Mohali, Punjab, India.
Amita Rani
Department of Physics, Barkatullah University, Bhopal, Madhya Pradesh, India.


A geomagnetic storm is a comprehensive disturbance within Earth’s magnetic field typically occurred due to anomalous circumstances within the solar wind plasma and interplanetary magnetic field (IMF) emissions caused by the different solar phenomenon. Moreover the magnitude of these geomagnetic effects largely depends upon the configuration and strength of potentially geo-effective solar/interplanetary features. In the present study the identification of 136 geomagnetic storms associated among disturbance storm time (Dst) decrease of more than -60 nT to -100 nT, have been made, which are observed during 1996-2012, the time period spanning over 23 and 24 solar cycle. We conclude that the main source of moderate storms were solar flares (B-class and M-class) however, a good number of these storms were also produced by CIR (Co-rotating interaction region).