Upper crustal shear-wave velocity structure Beneath Western Java, Indonesia from seismic ambient noise tomography

Abstract This paper presents the depth inversion of Rayleigh wave group velocity to obtain an S-wave model from seismic ambient noise cross-correlation in western Java, Indonesia. study utilizes vertical component data a temporary seismograph network deployed 2016, which was used previous estimate fundamental mode maps. In this study, Neighborhood Algorithm applied invert velocities into 1D shear-wave ( Vs ) profiles, were then interpolated produce high-resolution, pseudo-3D model. These tomographic images extend ~ 20 km and show pronounced NE-SW contrast low high range 1–5 that correlates well with Bouguer anomaly map. We interpret northeastern part area as associated alluvial volcanic products Sunda Shelf modern arc, whereas southwestern is arc earlier episodes subduction. also obtained northern Java Basin, 5–6 km, Garut extends 5 depth. For greater depths, gradually increases throughout reflects crystalline basement. provides estimates shallow crustal structure underneath West higher resolution than studies, could be useful for supporting future earthquake studies region.