| 尼泊尔地区季节性水文负荷对地震活动性的调制作用 |
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| 引用本文： | 王晨旭,熊永良,张鲁鹏,姜中山,张 芮,乔家原.尼泊尔地区季节性水文负荷对地震活动性的调制作用[J].大地测量与地球动力学,2020,40(6):596-600. |
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| 作者姓名： | 王晨旭 熊永良 张鲁鹏 姜中山 张 芮 乔家原 |
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| 摘 要： | 利用尼泊尔地区GPS时间序列季节性信号，构建区域季节性三维位移场和应力应变场模型，再结合降水和地震目录等数据，研究该地区季节性水文负荷对地震活动性的调制作用。结果表明：1）季节性地表位移与降水存在较强的时空相关性；2）季风期的降水对断层的长期运动趋势产生扰动，使库仑应力得到一定程度的释放，进而对地震活动产生抑制作用，并影响地震发生时间。
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| 关 键 词： | GPS时间序列 水文负荷 季节性位移 应力应变 地震活动性 |
Modulation of Seismic Activity by Seasonal Hydrological Load in Nepal |
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| WANG Chenxu,XIONG Yongliang,ZHANG Lupeng,JIANG Zhongshan,ZHANG Rui,QIAO Jiayuan.Modulation of Seismic Activity by Seasonal Hydrological Load in Nepal[J].Journal of Geodesy and Geodynamics,2020,40(6):596-600. |
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| Authors: | WANG Chenxu XIONG Yongliang ZHANG Lupeng JIANG Zhongshan ZHANG Rui QIAO Jiayuan |
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| Abstract: | The study of the disturbance process of hydrologic load on crustal stress is helpful in clarifying the relationship between hydrologic load and seismic activity. Using the seasonal signal of GPS time series in Nepal, the seasonal three-dimensional displacement field and stress-strain field model in this region is constructed. The modulation effect of seasonal hydrological load on seismicity in this area is studied by combining rainfall and seismic catalogue. The results show that: 1) there is a strong spatiotemporal correlation between seasonal surface displacement and rainfall; 2) the rainfall in monsoon period disturbs the long-term movement trend of the fault and releases the Coulomb stress to a certain extent, thus inhibiting the seismic activity and affecting the time of the earthquake. |
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| Keywords: | GPS time series hydrological load seasonal displacement stress and strain seismic activity |
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