Fluctuation analysis of solar radio bursts associated with geoeffective X-class flares |
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| Authors: | TB Veronese RR Rosa MJA Bolzan FC Rocha Fernandes HS Sawant M Karlicky` |
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| Institution: | 1. Lab for Computing and Applied Mathematics, Instituto Nacional de Pesquisas Espaciais (INPE), Brazil;2. Campus de Jataí, Universidade Federal de Goiás, Brazil;3. IP&D, Universidade do Vale do Paraíba, Brazil;4. Astrophysics Division, INPE, Brazil;5. Astronomical Institute of the Academy of Sciences of the Czech Republic, Czech Republic;1. Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA;2. Department of Physics and Astronomy, Clemson University, Clemson, SC 29631, USA;3. Department of Physics, Universidad Federal de Campina Grande, Campina Grande, PB, Brazil;1. Indian Institute of Geomagnetism, Shivaji University Campus, Kolhapur 416004, India;2. National Atmospheric Research Laboratory, Pakala Mandal, Gadanki 517112, Andhra Pradesh, India;3. Indian Institute of Geomagnetism, Navi Mumbai 410218, India;4. Department of Physics, Shivaji University, Kolhapur 416004, India;1. Faculty of Chemistry and Chemical Engineering, University of Maribor, Maribor, Slovenia;1. Leibniz-Institute of Atmospheric Physics at the University of Rostock, Kühlungsborn 18225, Germany;2. Department of Physics, University of Colorado, Boulder, CO 80309, USA;3. Graz University of Technology, 8010 Graz, Austria;4. Department of Meteorology, Stockholm University, 106 91 Stockholm, Sweden |
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| Abstract: | High temporal resolution solar observations in the decimetric range (1–3 GHz) can provide additional information on solar active regions dynamics and thus contribute to better understanding of solar geoeffective events as flares and coronal mass ejections. The June 6, 2000 flares are a set of remarkable geoeffective eruptive phenomena observed as solar radio bursts (SRB) by means of the 3 GHz Ondrejov Observatory radiometer. We have selected and analyzed, applying detrended fluctuation analysis (DFA), three decimetric bursts associated to X1.1, X1.2 and X2.3 flare-classes, respectively. The association with geomagnetic activity is also reported. DFA method is performed in the framework of a radio burst automatic monitoring system. Our results may characterize the SRB evolution, computing the DFA scaling exponent, scanning the SRB time series by a short windowing before the extreme event. For the first time, the importance of DFA in the context of SRB monitoring analysis is presented. |
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