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

Опубликовано в Russian Journal of Earth Sciences · Том 19, Номер 4, 2019 · Рубрики: ОРИГИНАЛЬНЫЕ СТАТЬИ
DOI 10.2205/2019ES000671
Получено: 25.08.2019 Одобрено: 25.08.2019 Опубликовано: 25.08.2019 Язык публикаций: ENG
Авторы
1 Geophysical Center of Russian Academy of Sciences
2 Геофизический центр РАН
, Институт физики Земли им. О. Ю. Шмидта РАН
Москва, Россия
3 Geophysical Center of Russian Academy of Sciences; Schmidt Institute of Physics of the Earth of the Russian Academy of Sciences
4 Geophysical Center of Russian Academy of Sciences; Schmidt Institute of Physics of the Earth of the Russian Academy of Sciences
5 Centre National d'Études Spatiales
6 National Research Nuclear University MEPhI
7 National Research Nuclear University MEPhI
8 Geophysical Center of Russian Academy of Sciences
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 is a common phenomenon, and the current cycle is no exception. Nowadays, thorough and multifactor space weather monitoring is required to prevent the damages from the destructive space weather impact on the technological systems on the Earth. 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. A combined analysis of secondary cosmic ray data from the muon hodoscope, geomagnetic activity indices and total electron content data is presented. The main advantage of this approach is the possibility to identify low-amplitude specific features in datasets characterizing several environmental sources. As an example, different datasets available over the storm period 6-11 September 2017 were analyzed in a unified way. The new developed technique allows us to study various space weather effects and obtain new mutually supportive information on different phases of storm evolution, based on the geomagnetic and other environmental observations in the near-Earth space.
Space weather events magnetic storms and substorms muon flux instruments and techniques generalized characteristic functions
Финансирование
The results presented in this paper rely on data collected at the INTERMAGNET magnetic observatories. We express our gratitude to the national institutes that support them and the INTERMAGNET community for promoting the high standards of magnetic observatory practice (http://www.intermag net.org). We also acknowledge URAGAN muon hodoscope data provided by the National Research Nuclear University MEPhI, and total electron content data provided by IZMIRAN ionosphere weather portal. This work employed facilities and data provided by the Shared Research Facility "Analytical Geomagnetic Data Center" of the Geophysical Center of RAS (http://ckp.gcras. ru/). The research has been conducted in the framework of the Russian Science Foundation project No. 17-17-01215.
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