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@InProceedings{AdhikariMendDomiEche:2018:ChHiIn,
               author = "Adhikari, Binod and Mendes J{\'u}nior, Odim and Domingues, 
                         Margarete Oliveira and Echer, Ezequiel",
          affiliation = "{St. Xavier’s College} and {Instituto Nacional de Pesquisas 
                         Espaciais (INPE)} and {Instituto Nacional de Pesquisas Espaciais 
                         (INPE)} and {Instituto Nacional de Pesquisas Espaciais (INPE)}",
                title = "Characteristics of high intensity long duration continuous auroral 
                         activities (hildcaas) and estimation of akasofu parameters along 
                         with its correction",
                 year = "2018",
         organization = "Cospar Scientific Assembly, 42.",
             abstract = "High Intensity Long Duration Continuous AE Activities (HILDCAAs) 
                         are form of geomagnetic disturbances caused by intermittent 
                         magnetic reconnection. By definition of HILDCAAs, which are 
                         intense auroral activity characterized by peak AE intensity 
                         greater than 1000nT at least for 2 days and within this period the 
                         value of AE never drops below 200nT for more than 2 h at a time. 
                         In our work, we study the characteristics of HILDCAA events based 
                         on auroral electrojet index and component of interplanetary 
                         magnetic field (Bz) using continuous wavelet transform and 
                         discrete wavelet transform. We also estimate the Akasofu 
                         parameters and its corrections during HILDCAAs. We found that 
                         during HILDCAAs, there is high fluctuation in IMF-Bz with 
                         corresponding peak of AE index. The CWT analysis shows highest 
                         intensity power areas from 50 to 300 minutes for both AE and Bz 
                         during the HILDCAAs. In DWT analysis, we used higher level of 
                         decomposition to identity the common singularities present on AE 
                         and Bz. Moreover, we found that different HILDCAA events have 
                         different geoeffectiveness based on their interplanetary cause and 
                         the amount of the average energy transferred to the 
                         magnetospheric/ionospheric system. We also found that second 
                         correction in Akasofu parameter gives nearly thrice the amount of 
                         energy predicted by Akasofu parameter without correction. This 
                         indicates that the solar wind magnetosphere energy coupling 
                         efficiency during the main phase of the storm is larger than in 
                         the HILDCAA interval.",
  conference-location = "Pasadena, California",
      conference-year = "14-22 July",
             language = "en",
        urlaccessdate = "01 dez. 2020"
}


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