Analysis the Main Parameters of Seismicity in the Seram Sea, Indonesia

Abstract

The Seram Sea is one of several small seas in the Indonesian archipelago and part of the Pacific Ocean which has very active tectonic activity. In this research, the data used are the recorded data of the Seram Sea earthquake and its surroundings in the period (1968-2018) with the strength of the earthquake (magnitude) ≥ 4 Richter scale (Rs). Based on the results of the analysis carried out, the seismicity parameter has the lowest b-value in the Seram Sea Region 3, which is 0.7986 and a- value is 5.8256. This occurred because this area has a greater amount of earthquakes to occur with a large magnitude due to high-stress levels. The largest Seismicity Index in the Seram Sea Region 3 is 0.0232. Region 3 in the Seram Sea has a fractal dimension (D) close to 1 indicating that in this region the source distribution in 1D. The slip ratio is close to 0.6609 which means that approximately 66.09% of the total relative shifts (slips) occur in the primary fault.