Abstract
Tangkuban Parahu, an active stratovolcano located approximately 15 km north of Bandung City in Indonesia, is the focal point of this study. The research aims to examine seismic structures within the crust beneath the Tangkuban Parahu Complex. To accomplish this, a teleseismic receiver function method was employed, utilizing broadband seismic stations along a seismological profile within the Tangkuban Parahu Volcano area. Waveform data were collected during the period from October 24, 2021, to March 31, 2022, for analysis. Various seismic wave phases, including P, Ps, PpPs, and PsPs, were identified in the recorded waveforms, within a time window extending from -2 seconds before the onset of the P-wave to 20 seconds after its onset. The analysis and modelling were conducted using the H-κ stacking receiver function technique. The findings of the H-κ stacking receiver function revealed notable variations in crustal structures, encompassing crustal thickness and the average crustal composition, as indicated by the Vp/Vs ratio, within the Tangkuban Parahu Volcano area. Preliminary results suggest that the crust beneath Tangkuban Parahu, estimated based on data from single seismic station, possesses a thickness of approximately 32.3 km, with a corresponding Vp/Vs ratio of around 1.746.
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