than initially thought. The earthquake sequence that started in February 2023 outlines a notable potential to generate significant earthquakes and draws attention of the scientific community to the complex tectonic mechanisms that are still active at present in this area [12; 13; 14]. Recent events underline the need for in-depth research to better understand the tectonic dynamics and adequately prepare for seismic hazards. Of note, the Getic Depression is a geological unit characterized by the presence of sedimentary formations favorable for the accumulation of hydrocarbons, and the first exploration and drilling activities for hydrocarbon extraction in this area started in the 1960s. Considering these particularities, the need to know in detail the geological structure in correlation with the geodynamics of the area becomes increasingly a demanding issue with implications on seismic hazard assessment. One tool that has proven to be particularly useful for investigating the 3D internal structure of the Earth is the seismic tomography. It inverts the structural model in a given area according to how seismic waves passing through it vary across that area. Both body waves and surface waves generated by earthquakes or explosions and seismic noise can be used in an inversion. It provides information about seismic wave velocity variations. Thus, areas with low velocities indicate warm, weakly consolidated or fluid-rich regions, such as magmatic chambers or active faults, and areas with high velocities reflect cold, rigid regions, such as stable lithospheric blocks or dense rocks. Seismic tomography has been widely applied both on global and local scales. For example, the application of seismic tomographic imaging techniques at the European scale provided spectacular 3D images of mantle structures which can readily be linked to global plate tectonic processes, such as the past and active subduction of lithospheric plates [15; 16], mantle plumes originating at a great depth [17; 18; 19; 20], and related surface processes such as intra-plate volcanism, rifting and vertical surface motions. Tomographic images contributed essentially to understanding and modelling of the coupled mantle-surface processes, a major research direction developed within the TOPO EUROPE initiative [21]. Tomography studies for the Carpathian-Pannonian region were developed following the installation of temporary stations first using teleseismic data (CALIXTO experiment, South Carpathian Project, 2009-2011) [22; 23; 24] and then, ambient noise data [25; 26]. To date, only one study has used local earthquake data for tomographic inversion focused on the Vrancea seismic region [27]. A number of features are common to all these investigations: the presence of a high-velocity body localized quasi-vertically beneath the Vrancea zone below 60 km depth and co-located with the intermediate-depth earthquake source, the diapiric upwelling of asthenospheric mantle (crustal thinning) on the one hand and the descent of a remnant subducted slab beneath Pannonian Basin in the mantle transition zone (400-600 km) on the other hand. The aim of this study was to show the seismic tomography of the Targu Jiu region using P- and S-wave arrivals from local events, to characterize its crustal structure through tomographic studies and to identify potential zones of geological hazard through seismological studies. Unlike the Vrancea area located in the bending zone of the Eastern Carpathians, the target area investigated in our study is characterized by moderate and less frequent inland seismicity located in the crust. However, the intensification of seismic activity recorded in 2023 has increased the interest in this area, both from the point of view of geodynamic modeling and updating the associated seismic hazard.