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首页> 外文期刊>Earth, planets and space: EPS >The 2011 off the Pacific coast of Tohoku Earthquake and its aftershocks observed by GEONET
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The 2011 off the Pacific coast of Tohoku Earthquake and its aftershocks observed by GEONET

机译：GEONET观测到的2011年东北太平洋地震及其余震

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The large displacement induced by the 2011 M 9.0 off the Pacific coast of Tohoku Earthquake was observed by GPS stations of the permanent GPS Earth Observation Network system (GEONET) in northeastern Japan. The displacement was characterized by the eastward displacement and subsidence in the Pacific coastal area. The horizontal displacement exceeded 5.3 m, which is the largest ever detected by GEONET. The mainshock was followed by a sequence of aftershocks. We processed the GPS data through a kinematic positioning strategy to clarify the deformation, including the deformation caused by the mainshock, with high temporal resolutions. The offsets calculated from the kinematic coordinates separately depict the coseismic displacements of the mainshock, the largest aftershock, and the third largest. The fault model for these earthquakes suggests that the largest (M 7.7) and third largest (M 7.3) aftershocks ruptured the southern and northern extensions of the mainshock fault, respectively.
机译：日本东北部永久性GPS地球观测网络系统（GEONET）的GPS站观测到2011年 M 9.0东北太平洋地震沿岸引起的大位移。位移的特征是太平洋沿海地区向东位移和沉降。水平位移超过5.3 m，这是GEONET探测到的最大位移。主震之后是一系列余震。我们通过运动定位策略对GPS数据进行了处理，以澄清具有较高时间分辨率的变形，包括由主震引起的变形。从运动坐标计算出的偏移分别描述了主震，最大余震和第三大震的同震位移。这些地震的断层模型表明，最大余震（ M 7.7）和第三大震源（ M 7.3）分别使主震断层的南部和北部延伸破裂。

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