study of ionospheric response to magnetic superstorms in the East Asian sector |
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| Authors: | OM Pirog NM Polekh EB Romanova GA Zherebtsov Jiankui Shi Xiao Wang |
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| Institution: | 1. Institute of Solar-Terrestrial Physics, Siberian Branch, Russian Academy of Science, Irkutsk, Russia;2. Center for Space Science and Applied Research, Chinese Academy of Sciences, Beijing, China;1. Department of Physics, Manav Rachna University, Faridabad 121001, India;2. Indian Institute of Geomagnetism, Mumbai 410206, India;1. South African National Space Agency (SANSA) Space Science, P.O. Box 32, Hermanus 7200, South Africa;2. Department of Physics and Electronics, Rhodes University, Grahamstown 6139, South Africa;1. Institute of Radio Physics and Electronics, University of Calcutta, 92 Acharya Prafulla Chandra Road, Kolkata 700009, India;2. The Abdus Salam International Centre for Theoretical Physics (ICTP), Trieste, Italy;3. Institute of Radio Astronomy, National Academy of Sciences of Ukraine (IRA NASU), Kharkiv, Ukraine;4. Department of Physics of the Earth, Astronomy and Astrophysics I, Facultad de Ciencias Físicas, University Complutense of Madrid (UCM), Ciudad Universitaria, Plaza de Ciencias 1, 28040 Madrid, Spain;5. Dept. of Applied Physics, S V National Institute of Technology, Surat 395007, India;6. Department of Electrical Engineering, University of Brasilia (UnB), 70910-900 Brasília, DF, Brazil;7. Smt. Kasturbai Walchand College, Sangli, India;8. Laboratoire de Physique de l''Atmosphère, Université Felix Houphouet Boigny, 22 BP 582 Abidjan 22, Cote d’Ivoire;9. T/ICT4D Laboratory, International Center for Theoretical Physics, Strada Costiera 11, 34014 Trieste, Italy;1. Institute of Meteorology and Oceanography, PLA University of Science and Technology, Nanjing 211101, China;2. State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China;3. State Key Laboratory of Space Weather, Chinese Academy of Sciences, Beijing 100190, China;1. West Department of Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation, RAS, 236017 Kaliningrad, Russia;2. Immanuel Kant Baltic Federal University, Department of Radiophysics and Information Safety, 238300 Kaliningrad, Russia;3. Institute of Solar-Terrestrial Physics SB RAS, 664033 Irkutsk, Russia;4. Beijing National Observatory of Space Environment, Institute of Geology and Geophysics, Chinese Academy of Sciences, 100029 Beijing, China;5. Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China;1. Institute of Earthquake Science, CEA, 100036 Beijing, China;2. Institute of Crustal Dynamics, CEA, 100085 Beijing, China |
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| Abstract: | In this paper, we present analyses of the great geomagnetic storms observed during last two cycles of solar activity. This study is based on data from a network of ionosondes located within the longitudinal sector of 80–150°Е. it was found that the superstorms were observed predominantly in equinox. Long-lasting severe decreases of ionization at high and middle latitudes were the most impressive storm effect. A short-time positive phase occurred in response to the onset of both ssc and recovery phases of the magnetic storm in the daytime at high and middle latitudes. Large time-varying rates of foF2 were observed at low latitudes. Modeling results of the ionospheric response to two superstorms are also presented. It is established that the storm effect at middle latitudes was controlled predominantly by disturbed thermospheric composition. At high latitudes, the impact of magnetospheric processes and thermospheric composition on the ionosphere was the same. |
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