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Long-term variations of geomagnetic activity and their solar sources

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Abstract

Geomagnetic activity in each phase of the solar cycle consists of 3 parts: (1) a “floor” below which the geomagnetic activity cannot fall even in the absence of sunspots, related to moderate graduate commencement storms; (2) sunspot-related activity due to sudden commencement storms caused by coronal mass ejections; (3) graduate commencement storms due to high speed solar wind from solar coronal holes. We find that the changes in the “floor” depend on the global magnetic moment of the Sun, and on the other side, from the height of the “floor” we can judge about the amplitude of the sunspot cycle.

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References

  • Feynman, J., Geomagnetic and solar wind cycles, 1900–1975, J. Geophys. Res., 1982, vol. 87, pp. 6153–6162.

    Article  Google Scholar 

  • Georgieva, K. and Kirov, B., Helicity of magnetic clouds and solar cycle variations of their geoeffectiveness, Proc. IAU Symposium 226 Coronal and Stellar Mass Ejections, Oxford, 2005, pp. 470–472.

    Google Scholar 

  • Obridko, V.N. and Shelting, B.D., Anomalies in the evolution of global and large-scale solar magnetic fields as the precursors of several upcoming low solar cycles, Astron. Lett., 2009, vol. 35, no. 3, pp. 38–44.

    Google Scholar 

  • Sabine, E., On periodical laws discoverable in the mean effects of the larger magnetic disturbances, Phil. Trans. R. Soc. London, 1852, vol. 142, pp. 103–124. doi 10.1098/rstl.1852.0009

    Article  Google Scholar 

  • Shelting, B.D. and Obridko, V.N., Sudden- and gradual-commencement magnetic storms as indices of solar activity, Russian Annual Conference on Solar Physics, Pulkovo, 2011.

    Google Scholar 

  • Simon, P.A. and Legrand, J.P., Some solar cycle phenomena related to the geomagnetic activity from 1868 to 1980. III. Quiet-days, fluctuating activity or the solar equatorial belt as the main origin of the solar wind flowing in the ecliptic plane, Astron. Astrophys., 1987, vol. 182, pp. 329–336.

    Google Scholar 

  • Tsurutani, B.T., Gonzalez, W.D., Gonzalez, A.L.C., et al., Corotating solar wind streams and recurrent geomagnetic activity: A review, J. Geophys. Res., 2006, vol. 111, pp. 11107–11132.

    Article  Google Scholar 

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Authors and Affiliations

  1. Space Research ant Technologies Institute — BAS, Sofia, Bulgaria

    B. Kirov & K. Georgieva

  2. IZMIRAN, Moscow, Russia

    V. N. Obridko, E. V. Nepomnyashtaya & B. D. Shelting

Authors
  1. B. Kirov
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  2. V. N. Obridko
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  3. K. Georgieva
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  4. E. V. Nepomnyashtaya
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  5. B. D. Shelting
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Correspondence to B. Kirov.

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Kirov, B., Obridko, V.N., Georgieva, K. et al. Long-term variations of geomagnetic activity and their solar sources. Geomagn. Aeron. 53, 813–817 (2013). https://doi.org/10.1134/S0016793213070128

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  • DOI: https://doi.org/10.1134/S0016793213070128

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