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Annales Geophysicae An interactive open-access journal of the European Geosciences Union
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Discussion papers | Copyright
https://doi.org/10.5194/angeo-2018-111
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Regular paper 30 Oct 2018

Regular paper | 30 Oct 2018

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This discussion paper is a preprint. It is a manuscript under review for the journal Annales Geophysicae (ANGEO).

A combined analysis of geomagnetic data and cosmic ray secondaries in the September 2017 space weather phenomena studies

Roman Sidorov1, Anatoly Soloviev1,2, Alexei Gvishiani1,2, Viktor Getmanov1, Mioara Mandea4, Anatoly Petrukhin3, and Igor Yashin3 Roman Sidorov et al.
  • 1Geophysical Center of the Russian Academy of Sciences (GC RAS), 119296 Moscow, Russian Federation
  • 2Schmidt Institute of Physics of the Earth of the Russian Academy of Sciences (IPE RAS), 123242 Moscow, Russian Federation
  • 3National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), 115409 Moscow, Russian Federation
  • 4Centre National d'Études Spatiales (CNES ), 2 place Maurice Quentin 75 039 CEDEX 01, Paris, France

Abstract. The September 2017 solar flares and the subsequent geomagnetic storms driven by the coronal mass ejections were recognized as the ones of the most powerful space weather events during the current solar cycle. The occurrence of the most powerful solar flares and magnetic storms during the declining phase of a solar cycle (including the current 24th cycle) is a well-known phenomenon. The purpose of this study is to better characterize these events by applying the generalized characteristic function approach for combined analysis of geomagnetic activity indices, total electron content data and secondary cosmic ray data from the muon hodoscope that contained Forbush decreases resulting from solar plasma impacts. The main advantage of this approach is the possibility of identification of low-amplitude specific features in the analyzed data sets, using data from several environmental sources. The data sets for the storm period on September 6–11, 2017, were standardized in a unified way to construct the generalized characteristic function representing the overall dynamics of the data sequence. The new developed technique can help to study various space weather effects and obtain new mutually supportive information on different phases of geomagnetic storm evolution, based on the geomagnetic and other environmental observations in the near-terrestrial space.

Roman Sidorov et al.
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Roman Sidorov et al.
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Short summary
Decidated to the combined analysis of space weather data (geomagnetic activity, cosmic ray secondaries and ionospheric data) obtained during the September 2017 solar flares and geomagnetic storms, this study is an attempt to construct a technique for circumterrestrial physical data analysis in order to analyze various space weather effects and obtain new mutually supportive information during major space weather events on different phases of geomagnetic storm evolution.
Decidated to the combined analysis of space weather data (geomagnetic activity, cosmic ray...
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