TY JOUR TI Manifestation of a 3D thaw bulb beneath a road embankment on geoelectrical sections obtained from 2D inversion of electrical resistivity tomography data with different observation system layouts KW electrical resistivity tomography (ERT) KW 3D modeling KW permafrost KW thermokarst. JO Vestnik AGGE AU Kuzina, Z.Y. AU Olenchenko, V.V. PY 2026 IS PB Association of Geologists, Geophysicists and Engineers