Significant earthquakes on the island of Sumatra, Indonesia, have predominantly been earthquakes with a thrust mechanism that occurred due to the subduction process and seismotectonics near coastal cities of West and South Sumatra, which could be affected by earthquakes triggered by these seismic sources. We compared the Seismic Hazard Function (SHF) of two coastal cities of Sumatra: Bengkulu and Padang. The results showed that the SHF of Bengkulu is higher than that of Padang. Estimated earthquake hazards are presented in the form of seismic hazard maps expressed as the PGA of 10% rate of exceedance probability in 50 years. In estimating the seismic potential in Sumatra, the seismic moment rate was jointly estimated from the smoothed mean seismicity rate and the pre-seismic subduction surface strain rate model. In this study, the island of Sumatra was chosen as a master model for Seismic Hazard Analysis (SHA). The motivation for choosing Sumatra for the SHA was because of the large body of complete historical earthquake data of the North Western Sunda Arc. The SHF is calculated based on a magnitude range of 6.0 to 9.0 during 50 years with the radius distance from the source less than or equal to 100 km.

中文翻译：

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苏门答腊岛沿岸震源研究（SHF）：对Padang和Bengkulu城市的SHF评价

印度尼西亚苏门答腊岛上的重大地震主要是推力机制的地震，这是由于苏门答腊西部和南部沿海城市附近的俯冲过程和地震构造所致，这些地震源可能会引发地震。我们比较了苏门答腊岛两个沿海城市（Bengkulu和Padang）的地震危险函数（SHF）。结果表明，Bengkulu的SHF高于Padang。估计的地震灾害以地震灾害图的形式表示，表示为50年内超过概率10％的PGA。在估算苏门答腊的地震潜力时，根据平滑平均地震活动率和地震前俯冲面应变率模型共同估算了地震矩速率。在这个研究中，苏门答腊岛被选为地震灾害分析（SHA）的主要模型。选择苏门答腊作为SHA的动机是因为西北Sun他弧西北部具有完整的完整历史地震数据。SHF是根据50年内6.0到9.0的幅度范围计算的，距源的半径距离小于或等于100 km。