Moho Depth Estimation using Receiver Function beneath Mt. Manglayang Area, West Java, Indonesia

This study aimed to determine the Moho depth using data from a single seismograph station known as JN01, located on the ITB campus in Jatinangor. The investigation focused on seismic events that occurred within a specific range of distances between 30° and 90° included a total of 34 events. The signals received were analyzed by the seismograph for each of these events. This analysis involved applying a bandpass filter ranging from 0.05 to 1 Hz. Subsequently, the receiver function method was used through a water-level deconvolution process (water-level set to 0.005, Gaussian factor 2.5). The receiver function signals from all 34 seismic events then stacked and determined the arrival time of the P-wave phases for the Ps phase at 3.063 seconds, the PpPs phase (TPpPs) at 11.408 seconds, and the PpSs + PsPs phase (TPsPs + PpSs) at 14.472 seconds. These arrival times were used in H-κ stacking to estimate the Moho depth with additional weight factors of 0.7, 0.2, and 0.1. Preliminary findings indicate that the Moho depth estimation in this area is approximately 28.4 km, and also determined a Vp/Vs ratio of about 1.733.