The Background Seismicity Contribution For Seismic Hazard In Manado City: Preliminary Result
M.Zulkifli (1,3), Wahyu Triyoso (2), Afnimar(2)

(1)Earth Sciences Graduate Program, Faculty of Earth Sciences and Technology, Bandung Institute of Technology

(2)Global Geophysics Research Group, Faculty of Mining and Petroleum Engineering, Bandung Institute of Technology

(3)Agency for Meteorology, Climatology, and Geophysics (BMKG), Manado, Indonesia

Abstract

Manado city is the largest population in North Sulawesi Province - Indonesia. It has significantly seismic hazard due to is located in seismically active complex region. This study aims to objective analysis the contribution of background seismicity for seismic hazard in Manado city. The algorithm of the seismicity smoothing (gridding seismcity) is applied to estimate the seismicity rate for background source. The method was conducted for analysis of seismic hazards is PSHA (probabilistic seismic hazard analysis) for 10% probability of exceedance in 50 years . The results show a maximum PGA in bedrock (0.17 g - 0.19 g ).

Keywords: Background source, PSHA, seismicity smoothing,PGA

Topic: Earth and Planetary Sciences