Co-seismic slip, post-seismic slip, and aftershocks associated with two large earthquakes in 1996 in Hyuga-nada, Japan
Co-seismic slip, post-seismic slip, and aftershocks associated with two large earthquakes in 1996 in Hyuga-nada, Japan
复制标题
与 1996 年日本日向滩两次大地震相关的同震滑动、震后滑动和余震
DOI：
10.1186/bf03351677
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发表时间：
2001
期刊：
影响因子：
--
通讯作者：
T. Sagiya
中科院分区：
文献类型：
--
作者：
Y. Yagi;M. Kikuchi;T. Sagiya
我们分析了连续的GPS数据，以研究与1996年10月19日和12月2日日本日向那田两次大地震有关的震后滑动的空间分布。我们发现，由于震后事件的时刻释放是可比的同震时刻释放在两次地震。震后第一次地震的震源参数为：矩释放量= 1.7 × 10 ~（19）Nm，最大滑动量= 0.06 m，位于震中西北约50 km处，特征衰减时间（=最终滑动量/初始斜率）= 15 d。震后第二次地震的矩释放量为2.0 × 1019 Nm，最大滑动量为0.13m，位于距第二次地震震中西北约15 km处，特征时间为100天。在这两个事件中，下行菲律宾海（PHS）板块的滑动矢量的SW走向板间边界指向西方，根据同震滑动。它还表明，同震滑动，震后滑动和余震的网站不重叠，但互补共享板块边界。这表明，个别网站的特点是由自己的组成法则，这可能会控制模式的时刻释放以及整个序列。
We analyzed continuous GPS data to investigate the spatial distribution of post-seismic slip associated with two large earthquakes of October 19 and December 2, 1996, in Hyuga-nada, Japan. We found that the moment release due to post-seismic events was comparable to the co-seismic moment release during the two earthquakes. The source parameters of the first post-seismic event are as follows: the moment release = 1.7 × 1019 Nm; the maximum slip = 0.06 m at about 50 km northwest from the epicenter of the first earthquake; the characteristic decay time (= final slip/initial slope) = 15 days. For the second post-seismic event, the moment release = 2.0 × 1019 Nm; the maximum slip = 0.13 m at about 15 km northwest from the epicenter of the second earthquake; the characteristic time = 100 days. In both events, the slip vectors of the downgoing Philippine Sea (PHS) Plate on the SW-striking interplate boundary are directed west, in accordance with the co-seismic slip. It is also shown that the sites for co-seismic slip, post-seismic slip, and aftershocks do not overlap but complementarily share the plate boundary. This suggests that individual sites are characterized by their own constitutive laws, which may control modes of moment release as well as the entire sequence.