@Article{Kane:2014:EvSoIn,
               author = "Kane, Rajaram Purushottam",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)}",
                title = "Evolution of solar indices during the maximum of solar cycle 24",
              journal = "Indian Journal of Radio and Space Physics",
                 year = "2014",
               volume = "43",
               number = "2",
                pages = "151--155",
             keywords = "Solar cycle 24, solar indices, sunspot number, coronal indices, 
                         interplanetary parameters.",
             abstract = "Solar cycle 24 started in 2008-2009 and a first peak (~67) in 
                         sunspot number (12-month running means) occurred in February 2012. 
                         Recently, sunspot activity seems to have increased. The latest 
                         12-month running mean attained a value 74.5 centered at September 
                         2013 and is larger than the previous maximum 67. Thus, cycle 24 
                         peak could be as high as ~75 but further increase is not ruled 
                         out. Several other solar indices (2800 MHz solar radio flux, 
                         Lyman-a, Mg II 280 index, total solar irradiance, all of origin in 
                         chromosphere or lower corona) also showed peaks at February 2012. 
                         But coronal indices, X-rays and coronal mass ejection (CME) 
                         frequency showed broad plateaus around February 2012. In 
                         interplanetary parameters, solar wind speed (V) showed a broad 
                         peak earlier than February 2012 (during September 2010-October 
                         2011) and a decline thereafter. The number density (N) did not 
                         seem to have any relationship with solar indices, but magnetic 
                         field (B) peaked near February 2012. The geomagnetic index (Ap) 
                         showed the same pattern as B. The decrease in maximum (peak) 
                         cosmic ray intensity at middle and high latitudes showed a delay 
                         with respect to peak of solar indices by several (more than ten) 
                         months. The main conclusion of the present communication is that 
                         during the maximum of cycle 24, the finer dynamic characteristics 
                         of the solar surface (photosphere) phenomena extend faithfully to 
                         the chromosphere and lower corona, but local dynamical effects 
                         occur higher up in the corona diluting the effects of the 
                         photospheric phenomena.",
                 issn = "0975-105X and 0367-8393",
                label = "scopus 2014-11 Kane:2014:EvSoIn",
             language = "en",
           targetfile = "Kane_evolution.pdf",
        urlaccessdate = "27 abr. 2024"
}