Possible Continuous Vertical Water Leakage of Deep Aquifer: Records from a Deep Well in Tianjin Province, North China

Figure 2

(a) Location of the North China Platform, the position of the groundwater well Gaocun (green triangle, GC: Gaocun), and the epicenters of the 2008 7.9 Wenchuan earthquake and the 2011 9.1 Tohoku earthquake (from Global CMT). The “beach balls” show the focal mechanism for the 2 huge earthquakes. Red lines indicate the surface faults [23]. (b) Well logs of Gaocun. The red lines and numbers indicate the depth of the observation aquifer (the screened section). For analyzing the impaction of major rocks in the observation aquifer, we neglected those rocks with small amount (references: Seismic Monitoring Records of China; Seismological Press, Beijing, 2004 (in Chinese)).

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