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Study of cosmic ray intensity variations in relation to solar activity for sunspot cycles 19 to 23

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Title Study of cosmic ray intensity variations in relation to solar activity for sunspot cycles 19 to 23
 
Creator Gupta, Meera
Mishra, V K
Mishra, A P
 
Subject Cosmic ray
Solar cycles
Sunspot numbers
Solar flux
Grouped solar flares
Solar flare index
Coronal index
 
Description 167-173
Based on the monthly data of various solar activity (SA) parameters, e.g. sunspot numbers (SSN), solar flux (SF), grouped solar flares (GSF), solar flare index (SFI) and coronal index (CI), a correlative study between solar activity (SA) and cosmic ray intensity (CRI, monthly mean of neutron monitor count rates) has been performed by the “running cross-correlation method”. Overall behaviour of the running cross-correlation function between CRI and different SA parameters is almost similar, except during the maxima of solar cycles. Moreover, the time-lag analysis has been performed by the method of “minimizing correlation coefficient” and it is found that observed time-lag between CRI and various SA parameters is similar, except the coronal index (CI). The time-lag is found to be larger for odd solar cycles (19, 21 and 23) in comparison to even solar cycles (20 and 22), showing odd-even asymmetry of solar cycles. The correlation between CRI and different SA parameters considering time-lag factor during the whole period of investigation has been presented. The differences observed in the time-lag between CRI and different SA parameters, especially for CI, have also been discussed.
 
Date 2009-04-15T04:53:08Z
2009-04-15T04:53:08Z
2006-06
 
Type Article
 
Identifier 0367-8393
http://hdl.handle.net/123456789/3839
 
Language en_US
 
Publisher CSIR
 
Source IJRSP Vol.35(3) [June 2006]