The GIS-EEDB (the Expert Earthquake Database) and GIS-ENDDB (the Earth's Natural Disasters DataBase) geoinformation systems implement methods for spatial-temporal analysis of both classical and new characteristics of the seismogeodynamic process. One of the new characteristics is a normalized creepex parameter that can be used in the statistical approach to studying of seismicity to assess a relative contribution of "soft" (creep) and "hard" (explosion) movements to the overall process of focal radiation. In this paper, the following modifications of the creepex parameter are proposed and compared: 1) Cr₀ - Cr_0-world and Cr_N-world - as the result of reducing the parameters Cr₀ and Cr_N of each event to the world average values of the creepex, obtained from the polynomial dependence of Cr_i-world (i= 0,N) on Cr_i-world, where Cr_i-world are calculated based on the world average estimates of M_S-world and m_b at uniform intervals of the seismic moment (NEIC catalog), 2) Cr_bji as the result of reducing Cr_N of each event to Cr_N-bji, i.e. to the average for the studied in this work BJI catalog creepex values obtained from the polygonal trend Cr_N(M_S) of all the catalog events. The advantage of using the creepex parameter, reduced to the trend of averaging the magnitudes of the catalog in question, is revealed, since the smallest linear dependence of the creepex on the magnitude is achieved (in comparison with the classical and normalized creepex) and the symmetry in the maximum amplitude of the deviation of the parameter relative to zero is preserved. Examples of the application of the compared parameters in specific seismic-geodynamic studies of aftershock processes of the Molucca and Simushir earthquakes also demonstrate the advantage of the parameter Cr_bji in the observed correspondence of the variations of the latter to the known physical processes in the focal zone of the Kashmir event, studied by the seismic-geodynamic methods of the GIS-EEDB geographical information system.