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Annales Geophysicae An interactive open-access journal of the European Geosciences Union
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Volume 27, issue 12 | Copyright
Ann. Geophys., 27, 4369-4377, 2009
https://doi.org/10.5194/angeo-27-4369-2009
© Author(s) 2009. This work is distributed under
the Creative Commons Attribution 3.0 License.

  02 Dec 2009

02 Dec 2009

Inverse reconstruction technique based on time-dependent Petschek-type reconnection model: first application to THEMIS magnetotail observations

V. Ivanova1, J. Liu2, S. Kiehas1, V. Semenov3, and H. Biernat1 V. Ivanova et al.
  • 1Space Research Institute, Austrian Academy of Sciences, 8042 Graz, Austria
  • 2IGPP/ESS, University of California, Los Angeles, CA 90095-1567, USA
  • 3Institute of Physics, St-Petersburg State University, 198504 St-Petersburg, Russia

Abstract. We apply the inverse reconstruction technique based on the two-dimensional time-dependent Petschek-type reconnection model to a dual bipolar magnetic structure observed by THEMIS B probe in the Earth's magnetotail during a substorm on 22 February 2008 around 04:35 UT. The technique exploits the recorded bipolar magnetic field variation as an input and provides the reconnection electric field and the location of the X-line as an output. As a result of the technique application, we get (1) the electric field, reaching ~1.1 mV/m at the maximum and consisting of two successive pulses with total duration of ~6 min, and (2) the approximate X-line position located in the magnetotail between 18 and 20 RE.

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