@InProceedings{González-AlarconGonzTsur:2007:VaGeAc,
               author = "Gonz{\'a}lez-Alarcon, Alicia Luiza Cl{\'u}a de and 
                         Gonzalez-Alarcon, Walter Dem{\'e}trio and Tsurutani, B. T.",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)}",
                title = "Variation of the geomagnetic activity for solar cycles 20 through 
                         23",
            booktitle = "Proceedings...",
                 year = "2007",
         organization = "Latin-American Conference on Space Geophysics, 8. (COLAGE).",
             abstract = "The variation geomagnetic activity during the last four solar 
                         cycles has been observed through the geomagnetic indices. In 
                         particular the mid-latitude index Dst, available since 1958, has 
                         been analyzed, by means of diverse statistical approaches. This 
                         index allows one to identify and classify by their intensity the 
                         geomagnetic storms that have occurred in this interval. The 
                         occurrence of magnetic storms, for a given intensity threshold and 
                         for different phases of the solar cycle, has been associated with 
                         the possible interplanetary causes by using data obtained from 
                         several satellites (i.e. WIND, ACE, IMP).",
  conference-location = "Merida, Mexico",
      conference-year = "11-17 July",
             language = "en",
        urlaccessdate = "20 maio 2024"
}