Seismological Studies of the Thrust Interface Beneath Tokyo

俯冲的菲律宾海板块和位于东京地下的欧亚板块之间的逆冲界面是地球上最危险的断层之一。由于地震活动水平低，只能从俯冲板块内发生的地震的位置间接推断出该断层的位置，这些地震的不确定度约为3-5公里。PI将利用地震重新定位技术的最新改进，以及更大的数据集，绘制出与重新定位的地震的信任界面的位置和形状，潜在精度约为100米。极准确的相对地震位置目录将为研究断层的力学性质提供基础，包括重复地震、中等规模事件的时空破裂反转，以及可能对该地区滑动瞬变的大地成像。这项研究的结合应该会改善对关东-东海地区地震危险性的估计，以及我们对地震破裂和断层力学的理解。

0074181McGuireThe thrust interface between the subducting Phillipine Sea plate and the overriding Eurasian plate, which lies underneath Tokyo, is one of the most dangerous faults on earth. Due to low seismicity levels, the location of this fault has been inferred only indirectly from the locations of earthquakes occurring within the subducted oceanic plate that have uncertainties of about 3-5 km. The PI will use recent improvements in earthquake relocation techniques, as well as a larger dataset to map out the location and shape of the trust interface with relocated earthquakes of potential accuracy on the order of ~100 m. The catalog of extremely accurate relative earthquake locations will provide the basis for studies of the mechanical properties of the fault, involving repeating earthquakes, space-time rupture inversions of moderate size events, and possibly geodetic imaging of slip transients in the region. This combination of studies should improve estimates of the seismic hazard in the Kanto-Tokai region as well as our understanding of earthquake rupture and fault mechanics.