author = "Fagundes, Paulo Roberto and Barbosa, Fl{\'a}vio Roony Evangelista 
                         and Kavutarapu, Venkatesh and Fejer, Bela G. and Pillat, Valdir 
                         Gil and Denardin, Clezio Marcos and Muella, M{\'a}rcio",
          affiliation = "{Universidade do Vale do Para{\'{\i}}ba (UNIVAP)} and {Instituto 
                         Federal de Tocantins (IFTO)} and {Universidade do Vale do 
                         Para{\'{\i}}ba (UNIVAP)} and {Utah State University} and 
                         {Universidade do Vale do Para{\'{\i}}ba (UNIVAP)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Universidade do Vale 
                         do Para{\'{\i}}ba (UNIVAP)}",
                title = "How and in which way space weather changed the ionospheric 
                         irregularities occurrence during the St. Patrick´s storm",
            booktitle = "Proceedings...",
                 year = "2017",
         organization = "AGU Fall Meeting",
             abstract = "During the solar cycle 24 there was a very intense geomagnetic 
                         storm, called St. Patrick´s Day storm and the effects of this 
                         storm on ionosphere has become a topic of extensive space weather 
                         investigation. The Dst during this storm reached -223 nT on March 
                         17, 2015 at 23:00 UT. Special efforts have been devoted so far to 
                         investigate many aspects of the St. Patrick´s Day ionospheric 
                         storm such as the prompt penetration electric fields (PPEFs), 
                         GPS-TEC changes, electron density disturbances, plasma drift, O+ 
                         concentration modification, hemispherical asymmetry developments, 
                         equatorial ionization anomaly (EIA) modification, and ionospheric 
                         irregularities. Besides all these important studies, there are 
                         some essential aspects, which have not been addressed yet, related 
                         to the occurrence of ionospheric irregularities with different 
                         scale sizes. In this paper, we present and discuss the generation 
                         and suppression of ionospheric irregularities during March 2015, 
                         using the observations conducted in the Latin American Sector from 
                         4 ionosondes (ESF) and 20 GPS-TEC stations (ROT phase 
                         fluctuation), which includes the St. Patrick´s Day geomagnetic 
                         storm period. Suppression of large-small scales ionospheric 
                         irregularities has occurred during the main and second night of 
                         the recovery phases. However, during the first night of recovery 
                         phase there was post-midnight ionospheric irregularities.",
  conference-location = "New Orleans",
      conference-year = "11-15 Dec.",
             language = "en",
        urlaccessdate = "15 jan. 2021"