Seismic microzonation of Bandung basin from microtremor horizontal-to-vertical spectral ratios (HVSR)

作     者：Bayu Pranata Tedi Yudistira Erdinc Saygin Phil R. Cummins Sri Widiyantoro Budi Brahmantyo Zulfakriza 

作者机构：1Earth Science Study Program Institute of Technology Bandung Indonesia 2Badan Meteorologi Klimatologi dan Geofisika Jakarta Indonesia 3Global Geophysics Research Group FTTM Institute of Technology Bandung Indonesia 5Commonwealth Scientific and Industrial Research Organisation (CSIRO) Perth Australia School of Physics&Astrophysics University of Western Australia Perth Australia 4Research School of Earth Science Australian National University Canberra ACT Australia 6Applied Geology Research Group FITB Institute of Technology Bandung Indonesia 

出 版 物：《AIP Conference Proceedings》 

年 卷 期：2018年第1987卷第1期

学科分类：07[理学] 0702[理学-物理学] 

摘      要：Bandung is located on a thick sedimentary basin, which is mainly composed of volcanic rocks and the depositional remnants of an ancient lake. The high population density and vital infrastructure, surrounding by potential sources of earthquakes make Bandung vulnerable to earthquake impact. To study the seismic response of Bandung, a microzonation study is needed so as to facilitate disaster risk assessment and mitigation. The parameters which are mapped for the purpose of microzonation are the distribution of the dominant frequency (F0), the amplification factor (Am) and seismic susceptibility (Kg). We use the HVSR analysis method with microtremor/ambient seismic noise data. The microtremor data were taken from 58 measurement points from the Bandung Seismic Experiment network run from March to October 2014 in the Bandung basin and surrounding areas. The results show that the dominant peak frequency in the studied area ranges from 0.195 Hz to 7.016 Hz, amplification (A) spans from 1.6 to 11.3, and the value of the seismic susceptibility index (Kg) ranges from 0.6 to 245.6. The spatial distribution of seismic susceptibility index indicates that almost all areas of the Bandung basin have high susceptibility to earthquake hazard. The highest susceptibility is found in the eastern part of the Bandung basin that includes Bojongsoang, Rancaekek, Ciparay, Rancasari, and Majalaya, while the lower susceptibility zones are scattered in the hills and mountains around the basin of Bandung.