Seismic hazard analysis with PSHA method in four cities in Java.

The Sensitivity of Attenuation Impact to Bedrock PGA Based on PSHA Analysis, Case Study: Yogyakarta Special Region, Indonesia

“…The range of bedrock PGA values from this study is 0.431-0.720g for the Pusgen logic tree and 0.405 to 0.709g for the Cummin logic tree. When compared with the results of the previous study [7], this study resulted in higher baseline PGA values. From the Indonesian Earthquake Map, the value that appears is not exactly the same as this study, this is due to the consideration of other aspects taken by the competent and interested parties in this study.…”

“…PGA (Peak Ground Acceleration) itself is mean acceleration representing the maximum response of degree of freedom at a period near to 0 seconds and always obtained by attenuation equation [2][3][4]. Some research that has been done in the research area is the analysis of the focal mechanism by considering the source of subduction in the southern part of Java [5], synthetic ground motion [6] and making PGA maps in four major cities in Java use EzFrisk [7]. In this paper, a probabilistic analysis of seismicity (PSHA) will be carried out by considering several earthquake sources in Indonesia (fault, background and subduction) and attenuation logic trees which are supposed to contribute to PGA in bedrock and partially on the surface.…”