The Isparta sedimentary basin is situated in the west Anatolian tectonic region and is surrounded by many active faults that are capable of producing destructive earthquakes. Due to the trapping of the seismic waves, such a basin could increase the magnitude and duration of earthquakes. Therefore, in estimating the earthquake hazard, the investigation of the alluvial accumulation and the bedrock depth geometry may play a vital role. The gravity method was used as the primary method and the measurements were carried out at 108 locations in order to investigate these properties within the Isparta basin. For the basin modeling, in addition to the gravity data, seismic reflection data were collected along two profiles (SRP-1, 84 CDP and SRP-2, 96 CDP) and borehole data compiled from the basin were used as supportive data. The 3D bedrock distribution map of the basin was obtained by using the gravity data and interpreted considering the obtained seismic reflection sections and borehole data. The deepest bedrock depth of the basin was determined to be about 510 m. Furthermore, the horizontal gradient (HG) and Euler deconvolution were obtained by using the gravity data for analyzing the lineaments in the basin. The results of the horizontal gradient and that of Euler deconvolution (SI:0) were compatible with each other. The depth distribution of bedrock and the fault lineaments are the factors that directly affect the seismic hazard. Therefore, it is expected that the results of this study will provide important data for determining the seismic hazard design.

伊斯巴达（Isparta）沉积盆地位于安纳托利亚西部构造地区，周围环绕着许多活动断层，这些断层能够引发破坏性地震。由于地震波的诱捕，这样的盆地可能会增加地震的幅度和持续时间。因此，在估算地震灾害时，对冲积层和基岩深度几何形状的研究可能起着至关重要的作用。重力法被用作主要方法，并在108个位置进行了测量，以调查伊斯巴达盆地内的这些性质。对于盆地建模，除了重力数据外，还沿两个剖面（SRP-1、84 CDP和SRP-2、96 CDP）收集了地震反射数据，并使用从盆地收集的井眼数据作为支持数据。利用重力数据获得盆地的3D基岩分布图，并考虑获得的地震反射剖面和井眼数据进行解释。确定该盆地最深的基岩深度约为510 m。此外，通过利用重力数据分析盆地中的构造，获得了水平梯度（HG）和欧拉反褶积。水平梯度的结果与欧拉反卷积（SI：0）的结果相互兼容。基岩的深度分布和断裂带是直接影响地震危险的因素。因此，可以预期的是，这项研究的结果将为确定地震危险性设计提供重要数据。