Estimation of Wave Propagation in West Bandung Regency A M Sari1*, A Fakhrurrozi1, D Sarah1, B Setiadi1, M R Daryono1, A J Syahbana1,2, R A Bakar3, and J C Lee4
1Pusat Penelitian Geoteknologi, Lembaga Ilmu Pengetahuan Indonesia LIPI, Bandung, Indonesia
2Fakultas Teknik Sipil dan Lingkungan, Institut Teknologi Bandung ITB, Bandung, Indonesia
3Universiti Kebangsaan Malaysia UKM, Kuala Lumpur, Malaysia
4Institute of Earth Science, Academia Sinica, Taipei, Taiwan
Abstract
Bandung Basin is one of the areas in West Java that is surrounded by active earthquake sources, which are the Lembang fault and the Cimandiri fault. The existence of these faults is now a concern, especially in West Bandung Regency, where development is starting to grow rapidly, i.e. the construction of tourist objects, housing clusters and government office buildings. Due to these conditions, the government began to consider the influence of these earthquake sources based on the geological conditions of the development area. This study analyzed the effect of wave propagation from the seismic ground motion to the surface ground. The method used is the non-linear earthquake response analysis method based on soil profile. The research located on West Bandung regency, which is spread over 14 CPTu points. The analysis results showed that the maximum value of surface PGA is on the Tanjung Jaya area, about 0.70g at the CPTu 04 point, while the lowest value is on Sindangkerta area, around 0.45g at the CPTu 05 point. The results of this analysis then visualized on a microzonation map. Furthermore, the results of this study can be used as a reference for calculating seismic risk to support disaster risk reduction programs.
Keywords: Wave Propagation, Seismic Hazard, Ground Motion, Soil Profile, Bandung Barat Regency
