The study of peak ground acceleration with probabilistic seismic hazard analysis (PSHA) method in the tolnaku landslide area of kupang regency - NTT

This paper reviews the value of peak ground acceleration (PGA), the spectra response value compared to the Earthquake Resilience Planning Procedure for Building and Non-Building Structures(SNI-1726-2002 and SNI-1726-2012) in the area of Kupang Regency and obtain the earthquake zone map in the similar region by using the Probabilitic Seismic Hazard Analysis (PSHA) method. Data used are seismic catalog data of ISC, USGS / NEIC, and the Meteorology, Climatology and Geophysics Agency (BMKG) from 1918 to 2015 periods with magnitude of M 5 on the Richter Scale and earthquakes epicenter distance of 500 km. Results of the spectra response based on the IndonesianNational Standards (SNI) with calculation results on measuring point 1 is 0.3010 g and 0.4736 g based on the calculation results, whilethe peak ground acceleration on rock surface based onthe Indonesian National Standard (SNI) is 0.7530 g and amounting to 1.1840 g based on the calculation results. While spectra response based on the Indonesian National Standard (SNI) with calculationon all measuring points is 0.4736 g; the lowest peak ground acceleration based on the Indonesian National Standard (SNI) is amounting to 0.2990 g and 0.2363 g based on the calculation results. The highest peak ground acceleration on rock surface based on the Indonesian National Standard (SNI) is amounting to 0.7625 g and based on the calculation results is 1.1840 g, while the lowest peak ground acceleration based on the Indonesian National Standard (SNI) is 0.7475 g and 0.5908 g based on the calculation results.