The spatial distributions of the errors in determination of the earthquake coordinates at the Garm test site

Abstract

In this work, the spatial distribution of errors in the localization of the earthquake epicenters at the Garm geophysical test site is analyzed. For this purpose, the coordinates of earthquakes over the period of 1955–1991 were calculated using three different methods and compared. It is shown that the residual errors of intrinsic convergence of the data presented in the catalogs as a characteristic of the accuracy in the determination of the earthquake hypocenter cannot serve as true estimates of errors of the epicenter location and should be supplemented by other characteristics, such as maximum errors of estimates. It is proposed to use the maps of difference between the corresponding coordinates of earthquakes in addition to the error estimates obtained using some other methods.