author = "Mendes J{\'u}nior, Odim and Domingues, Margarete Oliveira and 
                         Echer, Ezequiel and Hajra, Rajkumar and Menconi, Varlei Everton",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)} and {Laboratoire de Physique et Chimie 
                         de l’Environnement et de l’Espace (LPC2E)} and {Instituto Nacional 
                         de Pesquisas Espaciais (INPE)}",
                title = "Characterization of high-intensity, long-duration continuous 
                         auroral activity (HILDCAA) events using recurrence quantification 
              journal = "Nonlinear Processes in Geophysics",
                 year = "2017",
               volume = "24",
               number = "3",
                pages = "407--417",
                month = "Aug.",
             abstract = "Considering the magnetic reconnection and the viscous interaction 
                         as the fundamental mechanisms for transfer particles and energy 
                         into the magnetosphere, we study the dynamical characteristics of 
                         auroral electrojet (AE) index during high-intensity, long-duration 
                         continuous auroral activity (HILDCAA) events, using a long-term 
                         geomagnetic database (19752012), and other distinct interplanetary 
                         conditions (geomagnetically quiet intervals, co-rotating 
                         interaction regions (CIRs)/high-speed streams (HSSs) not followed 
                         by HILDCAAs, and events of AE comprised in global intense 
                         geomagnetic disturbances). It is worth noting that we also study 
                         active but non-HILDCAA intervals. Examining the geomagnetic AE 
                         index, we apply a dynamics analysis composed of the phase space, 
                         the recurrence plot (RP), and the recurrence quantification 
                         analysis (RQA) methods. As a result, the quantification finds two 
                         distinct clusterings of the dynamical behaviours occurring in the 
                         interplanetary medium: one regarding a geomagnetically quiet 
                         condition regime and the other regarding an interplanetary 
                         activity regime. Furthermore, the HILDCAAs seem unique events 
                         regarding a visible, intense manifestations of interplanetary 
                         Alfv{\'e}nic waves; however, they are similar to the other kinds 
                         of conditions regarding a dynamical signature (based on RQA), 
                         because it is involved in the same complex mechanism of generating 
                         geomagnetic disturbances. Also, by characterizing the proper 
                         conditions of transitions from quiescent conditions to weaker 
                         geomagnetic disturbances inside the magnetosphere and ionosphere 
                         system, the RQA method indicates clearly the two fundamental 
                         dynamics (geomagnetically quiet intervals and HILDCAA events) to 
                         be evaluated with magneto-hydrodynamics simulations to understand 
                         better the critical processes related to energy and particle 
                         transfer into the magnetosphereionosphere system. Finally, with 
                         this work, we have also reinforced the potential applicability of 
                         the RQA method for characterizing nonlinear geomagnetic processes 
                         related to the magnetic reconnection and the viscous interaction 
                         affecting the magnetosphere.",
                  doi = "10.5194/npg-24-407-2017",
                  url = "http://dx.doi.org/10.5194/npg-24-407-2017",
                 issn = "1023-5809",
             language = "en",
           targetfile = "mendes_characterization.pdf",
        urlaccessdate = "04 dez. 2020"