Geoeffectiveness of solar wind interplanetary magnetic structures |
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| Authors: | M.V. Alves E. Echer W.D. Gonzalez |
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| Affiliation: | 1. The Catholic University of America, Washington, DC 20064, USA;2. NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA;3. ARIES Nainital, Manora Peak, Nainital 263 129, India;4. Department of Physics, Indian Institute of Technology (BHU), Varanasi 221 005, India;5. Department of Physics, DSB Campus, Kumaun University, Nainital 263 002, India;6. TIFR/NCRA Radio Astronomy Center, P. O. Box 8, Ootacamund 643 001, India;7. Physical Research Laboratory, Navrangapura, Ahmedabad 380 009, India;8. Lockheed Martin Solar and Astrophysical Laboratory, Palo Alto, CA 94304, USA;9. Department of Physics and Astronomy, California State University Northridge, Northridge, CA 91330, USA;10. School of Space Research, Kyung Hee University, Yongin, Gyeonggi-Do 446-701, South Korea;11. Kadi Sarva Vishwavidyalaya, Gandhinagar 382 015, Gujarat, India;1. Faculty of Engineering, King Mongkut’s Institute of Technology Ladkrabang, Ladkrabang, Bangkok 10520, Thailand;2. Space Weather and Environment Informatics Laboratory, National Institute of Information and Communications Technology, Tokyo 184-8795, Japan;1. Department of Geophysics, Peking University, Beijing 100871, China;2. National Space Science Center, Chinese Academy of Sciences, Beijing 100190, China;3. State Key Laboratory of Space Weather, National Space Science Center, Chinese Academy of Sciences, Beijing 100190, China;4. Science China Press, Beijing 100717, China;1. South Regional Center for Space Research, National Institute for Space Research (CRS-INPE) and Space Science Laboratory of the Federal University of Santa Maria (LACESM/CT-UFSM), Santa Maria, RS, Brazil;2. Federal University of Santa Maria (UFSM), Santa Maria, RS, Brazil;3. Instituto de Pesquisa e Desenvolvimento (IP&D), Universidade do Vale do Paraíba (UNIVAP), Sao Jose dos Campos, Brazil;4. Aeronomy Division, National Institute for Space Research (DAE-INPE), Sao Jose dos Campos, Brazil;5. Center for Space Physics, Boston University, Boston, MA, USA;1. Astronomical Observatory of Jagiellonian University,30-244 Cracow, Poland;2. NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA;3. The Catholic University of America, Washington, DC 20064, USA |
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| Abstract: | We address the geoeffectiveness of three interplanetary structures in the interplanetary space: magnetic clouds (MCs), interplanetary shocks (IPSs), and corotating interaction regions (CIRs). The geoeffectiveness is evaluated using the geomagnetic indices Kp, AE, and Dst. We find that MCs are more geoeffective than IPSs, or CIRs. The average values of magnetic indices are significantly enhanced during disturbed periods associated with MCs, IPSs and CIRs, compared to the whole interval. The highest effect is noted for MC disturbed periods.Results obtained for the three data sets are used to derive a theoretical (continuous) probability distribution function (PDF) by fitting the histograms representing the percentage of events against the intervals of magnetic index. PDFs allow estimation of the probability of a given level of geomagnetic activity to be reached after the detection, by in situ solar wind observations, of a given interplanetary structure approaching the Earth. |
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