Periodicity of strain accumulation detected by permanent GPS Array: Possible relationship to seasonality of major earthquakes' occurrence
Periodicity of strain accumulation detected by permanent GPS Array: Possible relationship to seasonality of major earthquakes' occurrence
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永久GPS阵列检测到的应变积累的周期性：与大地震发生季节性的可能关系
DOI：
10.1029/2001gl013015
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发表时间：
2001
影响因子：
5.2
通讯作者：
S. Miyazaki
中科院分区：
文献类型：
--
作者：
M. Murakami;S. Miyazaki
日本约500个地点的连续GPS测量揭示了岛弧内地壳应变累积的时间周期分量。这种变化的幅度约为俯冲带耦合驱动的变形的稳定年分量的20- 30%。时间变化的幅度在空间上有很强的组织性，其与长期速度场的相关性表明这种现象的地球动力学起源。观测到的周期性可能有助于解释与日本俯冲带有关的大地震（震级>7.5）发生的季节性。
Continuous GPS measurements at about 500 sites in Japan reveal a time periodic component of crustal strain accumulation within the island arc. The magnitude of this variability is about 20–30 % of the steady annual component of deformation driven by coupling across the subduction zone. The amplitude of temporal variability is strongly organized in space, and its correlation with the secular velocity field suggests a geodynamic origin for the phenomenon. The observed periodicity may help to explain the seasonality of occurrence of the major earthquakes (Magnitude >7.5) associated with the Japanase subduction zone.