CRUSTAL SHEAR SEISMIC VELOCITY STRUCTURE (VS) BENEATH TANGKUBAN PARAHU USING RECEIVER FUNCTION
Tangkuban Parahu is one of the active strato volcano in Indonesia, it is located about 15 km north of Bandung City. Tangkuban Parahu has unique Vs characteristics, then an investigation of the seismic structure of the crust under the Tangkuban Parahu Volcano is carried out, using teleseismics rec...
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| Format: | Theses |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/73634 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Tangkuban Parahu is one of the active strato volcano in Indonesia, it is located
about 15 km north of Bandung City. Tangkuban Parahu has unique Vs
characteristics, then an investigation of the seismic structure of the crust under the
Tangkuban Parahu Volcano is carried out, using teleseismics receiver function that
utilizes broadband seismic stations along the seismological profile (Tangkuban
Parahu Volcano area). The recording station used is the recording period October
24, 2021 – March 31, 2022. Based on the recorded waveform, the P, Ps, PpPs, and
PsPs wave phases are identified as long as -5 seconds before the onset of P and 30
seconds after the onset of P. Analysis and modelling were carried out using least
square inversion and H-? stacking. This H-? stacking receiver function and
inversion technique show relatively the same crustal structures including crustal
thickness and average crustal composition through the Vp/Vs ratio in the
Tangkuban Parahu Volcano area. The preliminary results show that the thickness
of the crust beneath Tangkuban Parahu based on five seismic stations is estimated
to be around 31.63±0.423km, with a Vp/Vs ratio ranging from 1.7442±0.005. |
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