@Article{EcherGoDaViGuGoSc:2005:InShGe,
               author = "Echer, Ezequiel and Gonzalez, Walter Demetrio and Dal Lago, 
                         Alisson and Vieira, Luis Eduardo Antunes and Guarnieri, F. L. and 
                         Gonzalez, Alicia Luisa Clua de and Schuch, Nelson Jorge",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)} and {Instituto Nacional de Pesquisas 
                         Espaciais (INPE)} and {Instituto Nacional de Pesquisas Espaciais 
                         (INPE)} and {Instituto Nacional de Pesquisas Espaciais (INPE)} and 
                         {Instituto Nacional de Pesquisas Espaciais (INPE)}",
                title = "Interplanetary shocks and geomagnetic activity during solar 
                         maximum (2000) and solar minimum (1995-1996)",
              journal = "Advances in Space Research",
                 year = "2005",
               volume = "36",
               number = "12",
                pages = "2318--2322",
             keywords = "interplanetary shocks, geomagnetic activity, solar maximum, 
                         coronal mass ejections, magnetic storms, parameters.",
             abstract = "Plasma and magnetic field parameter variations through fast 
                         forward interplanetary shocks were correlated with the peak 
                         geomagnetic activity index Dst in a period from 0 to 3 days after 
                         the shock, during solar maximum (2000) and solar minimum 
                         (1995-1996). Solar wind speed (V) and total magnetic field (B-t) 
                         were the parameters with higher correlations with peak Dst index. 
                         The correlation coefficients were higher during solar minimum 
                         (r(2) = 56% for V and 39% for B-t) than during solar maximum (r(2) 
                         = 15% for V and 12% for B-t). A statistical distribution of 
                         geomagnetic activity levels following interplanetary shocks was 
                         obtained. It was observed that during solar maximum, 36% and 28% 
                         of interplanetary shocks were followed by intense (Dst <= - 100 
                         nT) and moderate (-50 <= Dst < - 100 nT) geomagnetic activity, 
                         whereas during solar minimum 13% and 33% of the shocks were 
                         followed by intense and moderate geomagnetic activity. It can be 
                         concluded that the upstream/downstream variations of V and B-t 
                         through the shocks were the parameters better correlated with 
                         geomagnetic activity level, and during solar maximum a higher 
                         relative number of interplanetary shocks can be followed by 
                         intense geomagnetic activity than during solar minimum. One can 
                         extrapolate, for forecasting goals, that during a whole solar 
                         cycle a shock has a probability of around 50% to be followed by 
                         intense/moderate geomagnetic activity.",
                  doi = "10.1016/j.asr.2003.04.076",
                  url = "http://dx.doi.org/10.1016/j.asr.2003.04.076",
                 issn = "0273-1177",
             language = "en",
           targetfile = "1-s2.0-S0273117705004527-main.pdf",
        urlaccessdate = "05 maio 2024"
}