A Deployment of Broadband Temporary Seismic Station around Tangkuban Parahu Volcano Complex: Preliminary Results
Keywords:
broadband seismometer, Tangkuban Parahu, Ambient noise tomography, green’s function, volcanoesAbstract
Tangkuban Parahu volcano is one of the active volcanoes in Indonesia, which is in West Bandung and Subang Regency, West Java Province. In this study, we deployed eight broadband temporary seismic stations around Tangkuban Parahu volcano to investigate the subsurface structure of Tangkuban Parahu and its surroundings. We used a Trillium Compact Nanometric broadband sensor and LPR-200 ANU data recorder with a duration of the recording is approximately one month (between May to June 2021). The ambient seismic noise tomography method was performed on the vertical component of the recorded data. At the first stage of data processing, we conduct the data preparation for each station, including downsampling, mean and trend removal, bandpass filtering, RMA time-domain normalization, and spectral whitening to reduce the earthquake signal recorded by instruments. The next step is the cross-correlation for daily data time series and stacked the results to obtain Rayleigh wave green’s functions between pairs of stations. This processing produced 56 empirical green functions with distances between pairs of stations in the range of 4 – 17 km.
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