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Annales Geophysicae An interactive open-access journal of the European Geosciences Union
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Volume 25, issue 4
Ann. Geophys., 25, 1037-1047, 2007
https://doi.org/10.5194/angeo-25-1037-2007
© Author(s) 2007. This work is distributed under
the Creative Commons Attribution 3.0 License.
Ann. Geophys., 25, 1037-1047, 2007
https://doi.org/10.5194/angeo-25-1037-2007
© Author(s) 2007. This work is distributed under
the Creative Commons Attribution 3.0 License.

  08 May 2007

08 May 2007

Control of high latitude geomagnetic fluctuations by interplanetary parameters: the role of suprathermal ions

N. Yagova1, V. Pilipenko1, J. Watermann2, and K. Yumoto3 N. Yagova et al.
  • 1Institute of the Physics of the Earth, Moscow, Russia
  • 2Danish Meteorological Institute, Copenhagen, Denmark
  • 3Kyushu University, Fukuoka, Japan

Abstract. We examine the statistical relationships between the interplanetary parameters and spectral power of the geomagnetic fluctuations in the 1–4 mHz frequency band at high latitude stations in two hemispheres. For that, we use a cross-correlative analysis of different combinations of parameters to identify a factor contributing most to the ULF power and to choose (whenever possible) the cross-related keynote controlling parameters. Along with the well-known dependencies of the high latitude pulsation power on the solar wind velocity and variations of the SW dynamical pressure and an additional factor – the flux of solar suprathermal ions with energies about several keV, has been established.

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