POINT CUMULATIVE SEMIVARIOGRAM FOR IDENTIFICATION OF HETEROGENEITIES IN REGIONAL SEISMICITY OF TURKEY

Geological events are neither isotropic nor homogeneous in their occur rences. These two properties present difficulties for spatial modeling of regionalized variables.. This paper presents a point cumulative se mivariogram (PCSV) technique for quantifying the heterogeneity charact eristics of the phenomenon concerned. The basis of the methodology is to obtain experimental PCSVs for each measurement point which led to e stimation of radius of influence around each site. In addition, the ex perimental PCSVs provide basic information about the heterogeneity of the geological variable in the region, and furthermore many useful int erpretations can be made concerning the regional variability of the va riable. It provides the measure of cumulative similarity of a regional variable around any measurement site. Because PCSV is a means of meas uring total similarity maps at fired similarity levels are provided in order to document the regional heterogeneity. Identification of heter ogeneities depends on the comparison of fixed PCSV values at a multitu de of irregularly scattered sites. The PCSV methodology has been appli ed to the regional seismic data of Turkey.