Response of the inner and outer magnetosphere to solar wind density fluctuations during the recovery phase of a moderate magnetic storm |
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| Affiliation: | 1. Institute of Solar–Terrestrial Physics, PO Box 4026, 664033 Irkutsk, Russian Federation;2. Institute of the Physics of the Earth, Moscow, Russia;3. Augsburg College, Minneapolis, USA;4. British Antarctic Survey, Cambridge, UK;1. Liisantie 1 A 4, Oulu, FIN-90560, Finland;2. The University of Newcastle, University Drive, Callaghan NSW 2308, Australia;3. Institute of Solar-Terrestrial Physics, Irkutsk 664033, Russia;1. Cardiology Department, Auckland City Hospital, Auckland, New Zealand;2. Department of Medicine, The University of Auckland, New Zealand;3. Dunedin Hospital, Dunedin, New Zealand;4. Wellington Hospital, Wellington, New Zealand;5. Christchurch Hospital, Christchurch, New Zealand;6. Waikato Hospital, Hamilton, New Zealand,;7. Liverpool Hospital, Sydney, NSW, Australia;1. State Key Laboratory of Coal Resources and Safe Mining, Xuzhou 221008, China;2. School of Safety Engineering, China University of Mining and Technology, Xuzhou 221008, China;3. College of Applied Science and Technology, China University of Mining and Technology, Xuzhou 221008, China;4. Mining Engineering Department, Missouri University of Science and Technology, Rolla, MO 65409, USA;1. Department of Spatial Information & Digital Engineering, School of Remote Sensing and Information Engineering, Wuhan University, 129 Luoyu Road, Wuhan, Hubei 430079, China;2. Dept of Computer Science and Engineering, New York University, 70 Washington Square South, New York City, NY, 10012, USA |
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| Abstract: | We examine the geomagnetic field and space plasma disturbances developing simultaneously in the solar wind, in the inner and outer magnetosphere, and on the ground from 0730 to 2030 UT on April 11, 1997 during the recovery phase of a moderate magnetic storm. The fluctuations of the solar wind density, H-component of the geomagnetic field, and power of Pc1–2 (0.1–5 Hz) waves at middle and low latitudes evolve nearly simultaneously. These fluctuations also match very well with variations of density and flux of the magnetospheric plasma at the geosynchronous orbit, and of the geomagnetic field at the geosynchronous orbit and northern polar cap. The time delay between the occurrence of disturbances in different magnetosphere regions matches the time of fast mode propagation. These disturbances are accompanied by the generation of Pc1–2 waves at mid- and high-latitude observatories in nearly the same frequency range. A scenario of the evolution of wave phenomena in different magnetospheric domains is proposed. |
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