Аннотация:Since 2020, magnetotelluric/magnetovariational (MT/MV) soundings have been conducted in thetriple-junction area of major segments (Fennoscandia, Sarmatia and Volga–Uralia) of the East EuropeanPlatform. The study area extends to the north the SMOLENSK sounding array with inclusion of new observations from summer, 2023. Thus, the SMOLENSK array approaches from the south to the LADOGAsounding array. This article presents the results of MT/MV data invariant analysis, describes the selection of data ensembles for three-dimensional (3D) inversion, and analyzes the resulting 3D resistivity model.