author = "Klausner de Oliveira, Virginia and Papa, Andr{\'e}s Reinaldo 
                         Rodriguez and C{\^a}ndido, Cl{\'a}udia Maria Nicoli and 
                         Domingues, Margarete Oliveira and Mendes, Odim",
          affiliation = "{Universidade do Vale do Para{\'{\i}}ba (UNIVAP)} and 
                         {Observat{\'o}rio Nacional (ON)} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)} and {Instituto Nacional de Pesquisas 
                         Espaciais (INPE)} and {Instituto Nacional de Pesquisas Espaciais 
                title = "An alternative way to identify local geomagnetically quiet days: a 
                         case study using wavelet analysis",
              journal = "Annales Geophysicae",
                 year = "2016",
               volume = "34",
               number = "4",
                pages = "451--462",
                month = "Apr.",
             keywords = "Geomagnetism and paleomagnetism (instruments and techniques, 
                         general or miscellaneous), Magnetospheric physics (solar 
                         wind-magnetosphere interactions).",
             abstract = "This paper proposes a new method to evaluate geomagnetic activity 
                         based on wavelet analysis during the solar minimum activity 
                         (2007). In order to accomplish this task, a newly developed 
                         algorithm called effectiveness wavelet coefficient (EWC) was 
                         applied. Furthermore, a comparison between the 5 geomagnetically 
                         quiet days determined by the Kp-based method and by wavelet-based 
                         method was performed. This paper provides a new insight since the 
                         geomagnetic activity indexes are mostly designed to quantify the 
                         extent of disturbance rather than the quietness. The results 
                         suggest that the EWC can be used as an alternative tool to 
                         accurately detect quiet days, and consequently, it can also be 
                         used as an alternative to determine the Sq baseline to the current 
                         Kp-based 5 quietest days method. Another important aspect of this 
                         paper is that most of the quietest local wavelet candidate days 
                         occurred in an interval 2 days prior to the 
                         high-speed-stream-driven storm events. In other words, the EWC 
                         algorithm may potentially be used to detect the quietest magnetic 
                         activity that tends to occur just before the arrival of 
                         high-speed-stream-driven storms.",
                  doi = "10.5194/angeo-34-451-2016",
                  url = "http://dx.doi.org/10.5194/angeo-34-451-2016",
                 issn = "0992-7689",
             language = "en",
           targetfile = "klausner_alternative.pdf",
        urlaccessdate = "05 dez. 2020"