Seismicity analysis Sulawesi North Arm based on B-Values

Sulawesi is one of the areas with high population. One of which is around the provinces of Gorontalo and North Sulawesi, in terms of geology, it is in the northern arm of Sulawesi. Some natural disasters lurk the population in this area, which is earthquake. B-value research are conducted to add information and insight in preparing hazard mitigation steps in this area. The data used are derived from BMKG throughout the years 1904 – 2014. Low B-value is in the sea area. The district of Gorontalo and Bolaang Mangondow indicated low fragility of the rock and high stress durability. In contrast, the highest b-value is at around Una-Una Volcano. Seismicity on this area caused by several fault lies beneath Sulawesi North Arm such as Gorontalo Fault and Sulawesi Double Subduction. The results can show that the concept of spatio-temporal anomaly in the b-value are statistically significant and carries important information on practical estimates related to hazard mitigation. (paper)