This geophysical investigation comprises :gravity and electrical resistivily mdhods that: add new infonnation to the geology and tectonic setting of the study area. The results show majorrnstructures, major lithologic layers, intrusive bodies and thermally affected zones from thernmantle-crust boundary to the surface.rnThe radially averaged power spectrum result of the Bouguer gravity marks the crust-mantlernboundaty at an average depth of 27 km. The Clust above this contact is classified in to threernmajor gravi-stratigraphic 'units, each unit consisting of a statistical ensemble of gravityrnanomaly sources generating comparable gravity field intensities. Geologically, the first deepseatedrngravi-stratigraphic unit of relatively high-density is about 15 to 17 km thickness and isrninterpreted as the Basement Complex (?) It is expected to be highly perforated, paliiallyrnmelted and assimilated with magmatic and basaltic intrusions. On top of this PrecambrianrnBasement a 5 to 7km thick Tertiaty basaltic sequence is found and this is overlaid by recentrnsiliceous volcanic products and recent rift sediments. The regional residual maps show thernmost tectonically active spreading zones at a depth greater than 10 km. The band pass filterrnapplied to the Bouguer map shows intrusions that make a gravity contrast of 18 to 20 mgalrnwith the host rock. These intrusions are situated under Shala caldera and under Aluto volcanicrncomplex. They are interpreted as magmatic intrusions or magma chambers. The tops of thesernmagmatic intrusions are below a depth of 7 km. The major intrusion beneath Aluto isrnbifurcates at this depth and show twin positive gravity anomalies at SSW of Adami-Tulu town and at nOlth of lake Langano bay. Major fl'actures and faulted zones (?) at about 2 to 3 kmrndepth are mapped. The presence of these stlUctures is clUcial if at all there is ground waterrnflow and hydrothermal fluid circulation at this depth. The mapped intlUsions are considered tornbe the geothelmal heat sources for the study area.rnIn the electrical resistivity interpretation, the apparent resistivity maps, the psuedosections andrnthe geoelectric sections could delineate thermally affected regions, hydrothermaly-alteredrnzones and stlUcturally weak zones. The Aluto volcanic rocks up to a depth 200 m show highrnresistivity values reaching to 3000 Ohmmeter. A very conductive region shows itself belowrnthis resistivity zone. The YES interpretations confirm the existence of a fi'actured and velYrnconductive zone at the location of La-3 and La-6 geothermal wells. This zone is considered asrnthe major up flow zone (TlMariam, 1996; ELC, 1986). The apparent resistivity maps alsornshow the increase in the conductivity of the subsurface with depth and the relative lateralrnresistivity distribution of the subsurface.rnBased on the joint analysis of the resistivity and the gravi-stratigraphic units at an estimatedrndepth of 0.5 to 2.5 km about six geothermal wells are anticipated. Besides, additionalrngeophysical methods are proposed to further reinforce the anticipated wells and furtherrnconfilm the outcome of this study.