author = "Venkatesh, K. and Ram, S. Tulasi and Fagundes, P. R. and Seemala, 
                         Gopi K. and Batista, Inez Staciarini",
          affiliation = "{Universidade do Vale do Para{\'{\i}}ba (UNIVAP)} and {Indian 
                         Institute of Geomagnetism} and {Universidade do Vale do 
                         Para{\'{\i}}ba (UNIVAP)} and {Indian Institute of Geomagnetism} 
                         and {Instituto Nacional de Pesquisas Espaciais (INPE)}",
                title = "Electrodynamic disturbances in the Brazilian equatorialand 
                         low-latitude ionosphere on St. Patrick’s Daystorm of 17 March 
              journal = "Journal of Geophysical Research: Space Physics",
                 year = "2017",
               volume = "122",
               number = "4",
                pages = "4553--4570",
                month = "Apr.",
             keywords = "equatorial ionization anomaly, prompt penetration electric field, 
                         St. Patrick's day storm, super fountain effect.",
             abstract = "The St. Patrick's Day storm of 17 March 2015 has a long-lasting 
                         main phase with the Dst reaching a minimum of \−223 nT. 
                         During the main phase, two strong prompt penetration electric 
                         field (PPEF) phases took place; first with the southward turning 
                         of IMF Bz around ~1200 UT and the second with the onset of a 
                         substorm around ~1725 UT leading to strong equatorial zonal 
                         electric field enhancements. The consequent spatiotemporal 
                         disturbances in the ionospheric total electron content and the 
                         resultant modifications in the equatorial ionization anomaly (EIA) 
                         over the Brazilian longitudinal sector are investigated in detail. 
                         The simultaneous measurements from a large network of GPS 
                         receivers, ionosonde, and magnetometers over the Brazilian 
                         longitudinal sector are used for this study. In the presence of 
                         enhanced zonal electric field, the equatorial F2 layer peak (hmF2) 
                         experienced a rapid uplift without any significant change in the 
                         base height (h\′F); while the F2 layer is redistributed 
                         into F2 and F3 layers. The enhanced zonal electric filed due to 
                         PPEF led to the strong super fountain effect under which the 
                         anomaly crest departed poleward to ~40°S latitude. In the presence 
                         of westward and equatorward wind surge over Brazil with the 
                         coexisting disturbance dynamo fields, strong hemispheric asymmetry 
                         is seen in the storm time response of EIA during both the PPEF 
                  doi = "10.1002/2017JA024009",
                  url = "http://dx.doi.org/10.1002/2017JA024009",
                 issn = "2169-9402",
             language = "en",
           targetfile = "Venkatesh_electrodynamic.pdf",
        urlaccessdate = "04 dez. 2020"