Coseismic water level changes induced by two distant earthquakes in multiple wells of the Chinese mainland
Coseismic water level changes induced by two distant earthquakes in multiple wells of the Chinese mainland
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两次远地地震引起的中国大陆多井同震水位变化
DOI：
10.1016/j.tecto.2016.11.040
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发表时间：
2017-01
期刊：
影响因子：
2.9
通讯作者：
Fu Qiong HUANG
中科院分区：
文献类型：
--
作者：
Yuchuan Ma;Fu Qiong HUANG
在2015年尼泊尔7.8级地震和2011年日本9.0级地震中，中国大陆的159口井和184口井记录了同震水位振荡，即阶梯状上升和阶梯状下降。地震震级及其相关的动应力对水位对地震变化的敏感性以及由此产生的同震水位变化的幅度和持续时间都有积极的影响。水位对潮汐敏感的水井对地震的反应潜力很大。阶梯式变化（上升或下降）的极性是局部控制和空间可变的，自流井通常记录水位上升。通过分析潮相响应，评估了渗透率增强是导致阶梯变化的机制。尼泊尔地震期间95口井中有17口渗透率呈阶梯状变化，日本地震后105口井中有32口渗透率呈阶梯状变化；然而，两次地震后只有6口井的渗透率发生了变化。
Coseismic water level oscillations, or step-like rises and step-like drops were recorded in 159 wells throughout the Chinese mainland due to the 2015 NepalMw 7.8 earthquake, and 184 wells for the 2011 JapanMw 9.0 earthquake. The earthquake magnitude, and the associated dynamic stresses, has positive roles in both the sensitivity of water level to earthquake induced change, and the amplitude and duration of resulting coseismic water level changes. Wells whose water levels are sensitive to Earth tides have high potential to response to earthquakes. Polarities of step-like changes (rises or drops) are locally controlled and spatially variable, with artesian wells generally recording water-level rises. Permeability enhancement was assessed as a mechanism responsible for step-like changes by analyzing the tidal phase responses. Permeability variations are inferred for 17 out of 95 wells with step-like changes during the Nepal earthquake and for 32 out of 105 wells following the Japan earthquake; however, only 6 wells have permeability variations after both earthquakes.
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影响因子：
1.7
作者：
Z. Geballe;Chi‐yuen Wang;M. Manga
通讯作者：
Z. Geballe;Chi‐yuen Wang;M. Manga
影响因子：
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作者：
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通讯作者：
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DOI：
10.1007/978-3-642-00810-8
发表时间：
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期刊：
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影响因子：
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作者：
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通讯作者：
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