Migrations and Clusters of Shallow Very Low Frequency Earthquakes in the Regions Surrounding Shear Stress Accumulation Peaks Along the Nankai Trough
Migrations and Clusters of Shallow Very Low Frequency Earthquakes in the Regions Surrounding Shear Stress Accumulation Peaks Along the Nankai Trough
复制标题
南海海槽剪应力累积峰周边浅层甚低频地震的迁移和集群
DOI：
10.1029/2019gl084666
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发表时间：
2019
影响因子：
5.2
通讯作者：
K. Shiomi
中科院分区：
文献类型：
--
作者：
Takemura;S. A. Noda;T. Kubota;Y. Asano;T. Matsuzawa;K. Shiomi
浅层慢震活动的时空特征与浅层板块边界的构造环境有关。本文利用互相关分析方法研究了南开海槽浅源甚低频地震活动的时空变化。在较大的超低层流体事件期间，超低层流体沿海沟走向向东迁移或扩散。超低速FEs的迁移和聚集反映了浅层慢滑事件的发生。观测到的SVLFE活动模式的横向变化反映了南开海槽浅板块边界有效强度的不均匀分布。在菲律宾海板块边界的应力积聚峰周围地区，有可能集中迁移和聚集超低能流场域。在高强度带和低强度带之间的过渡区积累的应力可以通过浅层慢地震释放。
The spatiotemporal characteristics of shallow slow earthquake activity are linked to the tectonic environments of shallow plate boundaries. In this work, the spatiotemporal variations of shallow very low frequency earthquake (SVLFE) activity along the Nankai Trough were investigated using a cross‐correlation analysis. The SVLFEs migrated or spread eastward along the strike direction of the trench during large SVLFE episodes. Migrations and clusters of SVLFEs suggest the occurrence of shallow slow slip events. The observed lateral variations in SVLFE activity patterns reflect the heterogeneous distributions of effective strengths at the shallow plate boundary along the Nankai Trough. Migrations and clusters of SVLFEs tended to be concentrated in the regions surrounding the stress accumulation peaks on the Philippine Sea Plate boundary. The stress accumulated in the transitional regions between high‐strength and low‐strength zones can be released by shallow slow earthquakes.
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影响因子：
56.9
作者：
Kato, Aitaro;Obara, Kazushige;Hirata, Naoshi
通讯作者：
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影响因子：
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DOI：
--
发表时间：
2010
期刊：
影响因子：
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作者：
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通讯作者：
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影响因子：
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作者：
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影响因子：
3.9
作者：
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