On the sunspot cycle and the yearly variation of solar magnetic variation at istanbul |
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Authors: | A. Mete Isikara |
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Affiliation: | (1) Institute of Geophysics, Faculty of Science, University of Istanbul, Istanbul, Turkey |
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Abstract: | Summary The sunspot cycle variation of the amplitude of the solar magnetic variation has been investigated for magnetically moderate, quiet and disturbed days at Istanbul for the period 1949–1968, and fairly good linear relationship has been found forZ andD components of the earth's magnetic field. In some cases, it is rather difficult to say that there is any linear relationship between sunspot number and the amplitude of theH component of the earth's magnetic field. Meanwhile,K indices has also been considered with sunspot number by means of multiple regression analysis to overcome some uncertainties in this investigation. |
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