On the asymmetrical magnetic and ionospheric effects caused by the large sunspots which appeared on the northern and the southern hemisphere of the sun

Details On the asymmetrical magnetic and ionospheric effects caused by the large sunspots which appeared on the northern and the southern hemisphere of the sun On the asymmetrical magnetic and ionospheric effects caused by the large sunspots which appeared on the northern and the southern hemisphere of the sun

May 1964

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1964jatp...26..607h&link_type=abstract

Journal of Atmospheric and Terrestrial Physics, vol. 26, no. 5, pp. 607-613

Physics

Scientific paper

In this paper, the author has used the superposed-epoch method to study the geomagnetic effect caused by the large sunspots with areas greater than 1000 millionths of the sun's disc. The results show that the geomagnetic activity caused by the large sunspots on the northern hemisphere is larger than that caused by those on the southern one: i.e. asymmetrical geomagnetic effects caused respectively by the northern and the southern sunspots exist. The same method was used to study the ionospheric effect of the large sunspots. The results show that the [latin small letter f with hook]0F2 corresponding to the sunspots which appeared on the northern hemisphere is, contrary to the case of the geomagnetic activity, smaller than that corresponding to the sunspots which appeared on the southern hemisphere. Reasons for such an asymmetry were not well known; however, one of the possible reasons for the smaller value of [latin small letter f with hook]0F2 for the northern sunspots than that for the southern ones seems to be explainable as the result that the geomagnetic activity caused by the northern sunspots is larger than that caused by the southern ones.

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