Modeling Crustal Structure in West Sumatera Using Teleseismic Receiver Function

Abstract Indonesia is located between three significant plate confluences that play a role in creating subduction zone. Sumatra, one of Indonesia’s provinces, near the collision Eurasian Plate, Indo-Australian and Pacific Plate. The Semangko Fault, Mentawai Islands, chain non-volcanic forearc islands, active faults induce earthquakes landslides are all produced by zones on Sumatra Island. receiver function approach was developed to identify discontinuity limits Earth’s structures, such as crust mantle, from teleseismic events. information this study comes 25 temporal 1 permanent station West time period 2007 2009 IRIS data station. earthquake taken components seismic stations using criteria arc distances 30° 90° magnitudes ranging 6.0 10.0. This research aims determine how crustal thickness distributed what effect regional geological structure has thickness. According early results study, estimated range region 27.11–32.48 km, Vp/Vs ratio values 1.70–2.19. direction thickening area likewise East-South.