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首页> 外文期刊>Pure and Applied Geophysics >Analysis and interpretation of earthquake-related groundwater response and ground deformation: a case study of May 2006 seismic sequence in the Mexicali Valley, Baja California, Mexico
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Analysis and interpretation of earthquake-related groundwater response and ground deformation: a case study of May 2006 seismic sequence in the Mexicali Valley, Baja California, Mexico

机译：地震相关地下水响应和地面变形的分析与解释 - 以2006年5月墨西哥百国加利福尼亚州梅卡利谷地震序列的案例研究

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摘要

Anomalous groundwater level and temperature changes are compared with ground deformation recorded before and after an earthquake of M ~(W)5.4 and its foreshocks and aftershocks that occurred during 22–28 May 2006 in the Mexicali Valley, Baja California, Mexico. The coseismic groundwater level changes could be attributed to static volumetric strain changes caused by the mainshock, except for one well, where the groundwater level change may have been affected also by a triggered slip event at a nearby fault. Some of the coseismic temperature changes were attributed to increased convection and mixing of groundwater by seismic shaking. Modeling of groundwater level records allowed the estimation of hydraulic diffusivity. The observed ground tilt and groundwater level anomalies in the area close to the source fault before and after the mainshock and before the aftershocks occurrence are explainable by the dilatancy–diffusion theory, or possibly by assuming the occurrence of a slow slip events and/or fault permeability changes.
机译：将异常的地下水位和温度变化与在M〜（W）5.4的地震之前和之后记录的地面变形进行了比较，其墨西哥墨西哥墨西哥梅克斯卡迪谷2006年5月22日至28日。电动发电机地下水位变化可能归因于主轴引起的静态容量变化，除了一个井，在附近故障时，地下水位变化也可能受到触发的滑动事件的影响。一些电动发电机温度变化归因于通过地震振动增加对流和对地下水的混合。地下水位记录建模允许估计水力扩散率。观察到的地面倾斜和地下水位在主轴之前和之后的区域靠近源故障以及余震发生前的源码，或者通过膨胀 - 扩散理论可解释，或者可能是假设慢速事件和/或故障发生的发生渗透性变化。

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