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Annales Geophysicae An interactive open-access journal of the European Geosciences Union
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Volume 27, issue 8
Ann. Geophys., 27, 3027-3030, 2009
https://doi.org/10.5194/angeo-27-3027-2009
© Author(s) 2009. This work is distributed under
the Creative Commons Attribution 3.0 License.

Special issue: 12th International Symposium on Equatorial Aeronomy...

Ann. Geophys., 27, 3027-3030, 2009
https://doi.org/10.5194/angeo-27-3027-2009
© Author(s) 2009. This work is distributed under
the Creative Commons Attribution 3.0 License.

  05 Aug 2009

05 Aug 2009

On the local time dependence of the penetration of solar wind-induced electric fields to the magnetic equator

M. C. Kelley and E. Dao M. C. Kelley and E. Dao
  • School of Electrical and Computer Engineering, Cornell University, Ithaca, NY, USA

Abstract. For a period of a few hours, the penetration of electric fields of solar wind origin is at its highest efficiency. In November 2003, five days of continuous vertical drift data were obtained at the Jicamarca Radio Observatory. Here we have isolated a range of frequencies centered at a few-hour period for a five-day period and have explored the local time dependence of the penetration, along with the time delay due to magnetospheric effects. We find that the latter ranges from 15 to 25 min. For the local time dependence, we find that the period of anti-correlation is roughly from 21:00 to 04:00 LT, with positive correlation at other local times.

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