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首页> 外文期刊>Seismological research letters >Hypocenter Relocation along the Sunda Arc in Indonesia, Using a 3D Seismic-Velocity Model
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Hypocenter Relocation along the Sunda Arc in Indonesia, Using a 3D Seismic-Velocity Model

机译：在印度尼西亚的Sunda弧形沿着Sunda弧形，使用3D地震速度模型

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The tectonics of the Sunda arc region is characterized by the junction of the Eurasian and Indo-Australian tectonic plates, causing complex dynamics to take place. High-seismicity rates in the Indonesian region occur due to the interaction between these tectonic plates. The availability of a denser network of seismometers after the earthquakes of M_w 9.1 in 2004 and M_w 8.6 in 2005 supports various seismic studies, one of which regards the precise relocation of the hypocenters. In this study, hypocenter relocation was performed using a teleseismic double-difference (DD) relocation method (teletomoDD) combining arrival times of P and S waves from stations at local, regional, and teleseismic distances. The catalog data were taken from the Agency of Meteorology, Climatology, and Geophysics (BMKG) of Indonesia, and the International Seismological Centre (ISC) for the time period of April 2009 to May 2015. The 3D seismic-wave velocity model with a grid size 1° × 1° was used in the travel-time calculations. Relocation results show a reduction in travel-time residuals compared with the initial locations. The relocation results better illuminate subducted slabs and active faults in the region such as the Mentawai back thrust and the outer rise in the subduction zone south of Java. Focal mechanisms from the Global Centroid Moment Tensor catalog are analyzed in conjunction with the relocation results, and our synthesis of the results provides further insight into seismogenesis in the region.
机译：Sunda弧区域的构造特征在于欧亚和印度 - 澳大利亚构造板的交界，导致复杂的动态。由于这些构造板之间的相互作用，印度尼西亚区域中的高震率率发生。 2004年M_W 9.1地震发生后的地震仪震线网络的可用性支持2005年的M_W 8.6支持各种地震研究，其中一项关于低缩进者的精确迁移。在该研究中，使用Telesmicic Double差异（DD）重定位方法（Teletomodd）与局部，区域和Teleseismic距离的电台组合的到达时间（Teletomodd）进行次静脉迁移。目录数据从印度尼西亚的气象，气候学和地球物理学（BMKG）和国际地震中心（ISC）占据了2009年4月至2015年5月的国际地震中心（ISC）。与网格的3D地震波速度模型在旅行时间计算中使用1°×1°。搬迁结果表明，与初始位置相比，旅行时间残留的减少。搬迁结果更好地照亮了该地区的俯冲板和主动故障，例如介绍后推力和Java南部俯冲区的外层升高。与全局质心矩张解器目录的焦点机制与搬迁结果结合分析，我们对结果的合成提供了进一步的洞察该地区的地震发生。

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