Preliminary Result of Shear Wave Velocity Construction from Love Wave Group Velocity Using Ambient Noise Tomography in West Java, Indonesia
Nurida Luthfiyani (a*), Shindy Rosalia (b), Tedi Yudistira (b), Andri Dian Nugraha (b), Sri Widiyantoro (b), Antonius Nanang Tyasbudi Puspito (b)

a) Master Program of Geophysical Engineering, Faculty of Mining and Petroleum Engineering, Institut Teknologi Bandung, Jalan Ganesa No. 10, Bandung 40132, Indonesia.
*nuridaluthfiyani[at]gmail.com
b) Global Geophysics Research Group, Faculty Mining and Petroleum Engineering, Bandung Institute of Technology, Jalan Ganesa No. 10, Bandung 40132, Indonesia.

Abstract

West Java, Indonesia is located in the northern part the subduction zone between Australian and Eurasian plate which has complex tectonic setting and high seismicity level. To investigate this area, Institut Teknologi Bandung (ITB) and Australia National University (ANU) collaborated to deployed 85 temporary seismometers in 2016 and 2018. We constructed the shallow crust profile by applying the Ambient Noise Tomography (ANT) method to improve our knowledge of the tectonic condition in this area. In this research, we only use the north-south (NS) and east-west (EW) component to extract the Love waves Green\(\prime{}\)s function. We first rotated the NS and EW daily data series to obtain the transverse component. We then pre-processed the transverse daily data and applied cross-correlation to all station pair data. The daily cross-correlated data then stacked to obtain the Love waves Green\(\prime{}\)s function. The Green\(\prime{}\)s function is clearly seen in 1-40 s period band. Then, the obtained Green\(\prime{}\)s function will be analyzed to get the Love waves group velocity which then will be inverted to obtain the shear wave velocity (Vs) profile beneath the study area.

Keywords: Ambient Noise Tomography, Love waves, and West Java.

Topic: Earth and Planetary Sciences