Geomagnetic storm dependence on the solar flare class

Details Geomagnetic storm dependence on the solar flare class Geomagnetic storm dependence on the solar flare class

2006-01-25

arxiv.org/abs/physics/0601197v1

Cosmic Research, 2009, Vol. 47, No. 6, pp. 460--465

Physics

Space Physics

3 pages, 1 table

Scientific paper

10.1134/S0010952509060021

Content. Solar flares are often used as precursors of geomagnetic storms. In particular, Howard and Tappin (2005) recently published in A&A a dependence between X-ray class of solar flares and Ap and Dst indexes of geomagnetic storms which contradicts to early published results. Aims. We compare published results on flare-storm dependences and discuss possible sources of the discrepancy. Methods. We analyze following sources of difference: (1) different intervals of observations, (2) different statistics and (3) different methods of event identification and comparison. Results. Our analysis shows that magnitude of geomagnetic storms is likely to be independent on X-ray class of solar flares.

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