ANALISIS BAHAYA BENCANA GEMPABUMI DI WILAYAH BITUNG MENGGUNAKAN METODE PROBABILITY SEISMIC HAZARD ANALYSIS

Abstract

Bitung district was an active seismic area in North Sulawesi Province. This is because of plate
tectonic activity, among other things, subduction of West Molucca Sea and subduction of North
Sulawesi Trench that can cause earthquake disaster. Earthquake is an unpredictable disaster that
can pose a danger to a region. So the purpose of the research is to minimize the impact of the
earthquake disaster. The study conducted with study of the earthquake hazard analytics using
probability approaches with 500-year-old return period, probability exceeded 10% in 50 years of
building age in condition T= 0 second, T= 0.2 second and T= 0.1 second. PSHA’s calculation in the
Bitung region were obtained at PGA value of the same amount 1.4g – 1.8g, SA value T= 0.2 second
is 1,7g-2,1g and SA value T= 1,0 second is 0,5-0,6g. as for the turbulence of the result of te
conversion of the PGA value being on the VIII-IX MMI scale which means it can cause a serious
risk of damage to the building.