菲律宾海板块西缘强震活动与地球自转角加速度变化关系研究

Analysis of the Relationship between the Strong Earthquakes in the Western Edge of the Philippine Sea Plate and the Earth Rotation Angular Acceleration

统计分析了1962~2016年菲律宾海板块与欧亚板块挤压带俯冲带强地震活动与地球自转角加速度变化间的关系。结果显示,研究时段菲律宾海板块西边缘带的25次强地震活动(MS≥7.5)有21次都发生在地球自转角加速度上升期,表明该地区强地震活动与地球自转角加速度之间存在相关性,最后讨论了这种相关性可能的力学机理。

In this paper,the relationship between the earth rotation angular acceleration variation and strong earthquake activity along the Eurasian-Philippine Sea plate subduction zone from 1962 to 2016 has been investigated. The results show that 21 of 25 strong earthquakes（M_S≥7.5） during the study on the western edge of the Philippines Sea plate occurred in the rising periods of the Earth rotation angular acceleration,proving the correlation between the strong seismic activity in the area and the earth rotation angular acceleration. Finally,the possible mechanical mechanism of this correlation is discussed.