IJERT-EMS
IJERT-EMS

Records of the Geomagnetic Storm of March 17, 2015 in the Brazilian Equatorial Region


Records of the Geomagnetic Storm of March 17, 2015 in the Brazilian Equatorial Region
Authors : Gilmar Alves Silva, Roberto Câmara De Araujo, Fransuah Henrique Alves Silva
Publication Date: 03-10-2017

Authors

Author(s):  Gilmar Alves Silva, Roberto Câmara De Araujo, Fransuah Henrique Alves Silva

Published in:   International Journal of Engineering Research & Technology

License:  This work is licensed under a Creative Commons Attribution 4.0 International License.

Website: www.ijert.org

Volume/Issue:   Volume. 6 - Issue. 09 , September - 2017

e-ISSN:   2278-0181

Abstract

Using data from geomagnetic-sensitive instruments, this article analyzes the geomagnetic storm that occurred on March 17, 2015, characterized as intense and associated with a eruption of filaments and a solar flare of class C9.1 occurred on March 15, 2015. These solar events triggered a halo-type geo-effective CME, which generated a severe geomagnetic storm on March 17, 2015 (the minimum Dst -223 nT at 23 UT). The results showed that the strong geomagnetic storm produced a great impact on the ionosphere. The effects of the storm show changes in the ionospheric parameters measured in the Brazilian stations of Boa Vista (2.82° N, 60.7° W), Campo Grande (20.50° S, 54.70° W), Fortaleza (3.70° S, 38.5° W) 2.53° S, 44.30° W). The results showed that foF2 and TEC did not show important changes during the main phase. But changes in foF2 and TEC were observed at all seasons during the storm recovery period, which contributed to significant changes occurred in the ionosphere (SF) thickness. Another important phenomenon that arose with the geomagnetic tempest was the formation of ionospheric F3 layer.

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