Cosmic Ray Associated with Coronal Index and Solar Flare Index during Solar Cycle 22 - 23

Abstract

We study the relation between monthly average counting rates of the cosmic ray intensity (CRI) observed at Moscow Neutron Monitoring Station, solar flare index (SFI) and coronal index during the solar cycles 22 and 23, for the period 1986-2008. The long-term behaviour of various solar activity parameters: sunspot numbers (SSN), solar flare index (H α flare index), coronal index (CI) in relation to the duration of solar cycles 22 and 23 is examined. We find that the correlation coefficient of CRI with the coronal index as well as H α flare index is relatively large anti-correlation during solar cycle 22. However, the monthly mean values of sunspot number, H α flare index, and coronal index are well positively correlated with each other. We have analyzed the statistical analysis of the above parameters using of linear model and second order polynomial fits model.

Effect of Coronal Mass Ejection on Earth’s Magnetic Field during Ascending Phase of Solar Cycles 23-24

“…It is well-known that the most solar cycles show a double peak due to the out-of-phase activity in the two hemispheres [11]. The double peak in SSN during solar cycle 24 is the second peak is larger than the first one by ~20%.…”