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All Journal Jurnal Geologi dan Sumberdaya Mineral (Journal of Geology and Mineral Resources)
Afnimar Afnimar
Teknik Geofisika, Fakultas Teknik Perminyakan dan Pertambangan, ITB
Chemistry Earth & Planetary Sciences Energy

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MIKROZONASI BAHAYA GEMPA BUMI DI WILAYAH KOTA BANDUNG BERDASARKAN DATA MIKROTREMOR Marjiyono Marjiyono; Afnimar Afnimar
Jurnal Geologi dan Sumberdaya Mineral Vol. 21 No. 1 (2011): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v21i1.134

Abstract

Bandung is one of the metropolitan city which rapidly developed and tectonically located in the vicinity of active tectonic lines. The surface geology condition of this region vary from very soft sediments to hard volcanic rocks. The soft sediment area has potential to experience amplification when an earthquake occure. Characterization of surface geology is necessary to identify vulnerability level in order to mitigate the earthquakes hazard in this region. In this regard, we have conducted microtremor measurements in 97 sites which are spread throughout the city of Bandung. Data processing is based on the Nakamura method (HVSR) to obtain the value of amplification factor. The results show the value of amplification factor ranged from 2.1 to 17, with the highest amplification factor distribution in the southeastern of the research area. Distribution of this very high amplification factors are broadly corresponded with lacustrine sediment (lake sediment). The amplification factor scores were then used as the basis in determining the level of relative vulnerability to earthquake hazards.Keywords : microtremor, effect of surface geology, amplification factor, Nakamura methods.
Co-Authors Marjiyono Marjiyono