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Research Paper | Astronomy Science | India | Volume 5 Issue 5, May 2016
Coronal Mass Ejection, Magnetic Cloud and their Geoeffectiveness During 1996-2009
Rohit Verma, Santosh Kumar, Shushil Kumar Dubey
A detailed investigation on geoeffectiveness of Coronal Mass Ejections [ CMEs ] associated with Magnetic Clouds [ MCs ] observed during 1996-2009 have been studied. The collected sample events are divided into two groups based on their association with CMEs related to geomagnetic storms Dst -50 nT eg. 1. geoeffective events and 2. For nongeoeffective events Dst -50nT. Furthermore, most of the CMEs are of halo type occurred mostly in western hemisphere. Halo and partial halo CMEs are likely to be the major cause for Geomagnetic storms [GMSs ] of high intensity. There exists a weak anti-correlationship ( R = - 0.36 ) for geoeffective events between CME speed [ VCME ] and Dst index and relatively better correlation 1. between VCME and solar wind speed [ VSW ] ( R= 0.54 ) and 2. Dst index and solar wind speed ( R=0.64 ), whereas, the correlation ( R=0.16 ) between Dst index and southward magnetic field component [ BZ ] is very poor. From our findings, we have observed that the intense and long duration, southward magnetic field component [ BZ ] and fast solar wind speed are responsible for geomagnetic storms, and geomagnetic storms weakly depend on CME velocity.
Keywords: Coronal Mass Ejections, Magnetic Cloud, Solar Wind, Geomagnetic Stroms
Edition: Volume 5 Issue 5, May 2016
Pages: 1832 - 1836
How to Cite this Article?
Rohit Verma, Santosh Kumar, Shushil Kumar Dubey, "Coronal Mass Ejection, Magnetic Cloud and their Geoeffectiveness During 1996-2009", International Journal of Science and Research (IJSR), https://www.ijsr.net/search_index_results_paperid.php?id=21051601, Volume 5 Issue 5, May 2016, 1832 - 1836
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