Teleseismic inversion of crustal S-wave velocities beneath the Isparta Station

Three distinct crustal depth ranges are identified based on the inverted velocity-depth profile. The first corresponds to 0-5 km where the velocity-depth profile has a positive gradient with an increase from 2.5 km s−1 to 3.0 km s−1. The second depth range is 5-10 km and the velocity-depth profile shows a positive gradient between 3.0 km s−1 and 3.20 km s−1. A velocity jump from 3.20 km s−1 to 3.62 km s−1 tops the third depth range (10-20 km), which is characterized by a constant velocity. There is another velocity drop at 20 km depth from 3.62 km s−1 to 3.40 km s−1 and the low velocity therein is persistent down to 27.5 km. Below this depth range, the shear velocity increases until 40 km depth where the Moho discontinuity is estimated with Sn velocity of 4.4 km s−1. In general, seismic velocities under SW Anatolia are considerably slower than those of the Preliminary Reference Earth Model (PREM).