Preliminary study of great earthquakes relocation in the last decade (2008-2018) in north and central region of Sulawesi Island

Abstract

Research has been conducted to determine the position of earthquakes that occurred in Sulawesi Island in the last decade (2008-2018). The study area included 2.64 N; 126 E; 118.57 W; and -7.36 S with a maximum depth of 1000 km. A total of 13 data of seismicity were recorded on 26 BMKG stations with a magnitude more than equal to 6 Richter scale. Relocation was done based on the travel time data of P wave and S wave obtained from the Seismic Analysis Code. The data were processed using Geiger method to determine earthquake position. The earth model used in this study was diverse. The relocation result depends on the model of the earth used. Local earth models were required to perform routine data analysis of activities in the region of Sulawesi earthquake.