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Title: Comparative study of different solar parameters with sunspot numbers
Authors: Mishra, V K
Tiwari, D P
Tiwari, C M
Agrawal, S P
Keywords: Sunspot number;Sunspot area;Grouped solar flares;Solar flare index;Solar cycles
Issue Date: Feb-2005
Publisher: NISCAIR-CSIR, India
PACS No.: 96.60 Rd: 96.60 Qe
Abstract: Based on the monthly data of various solar parameters e.g. sunspot numbers (SSN), sunspot area, grouped solar flares (GSF) and solar flare index (SFI) for the last four solar cycles (19 to 22) as well as for the present cycle 23 (up to year 2003), a detailed correlative study has been performed. It has been found that, on monthly average basis, the SSN are highly correlated with other solar parameters and hence, SSN can be safely used as a solar parameter for any correlative study, until and unless there are some specific reasons to use other easily available solar parameters (or indices). Moreover, it was found that with the progression of solar cycle, from cycle 20 to 23 the slope of the regression line between SSN and GSF or SFI decreases continuously. However, no such unidirectional change is observed in the correlation coefficient.
Page(s): 13-16
ISSN: 0975-105X (Online); 0367-8393 (Print)
Appears in Collections:IJRSP Vol.34(1) [February 2005]

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