A discussion about the adjustment and optimization of subsurface fluid monitoring network in China

The current situation of the earthquake subsurface fluid monitoring network in China is briefly introduced. And then, some suggestion on adjustment and optimization of the network are proposed. ① Change the layout of the existing monitoring network so as to focus on the middle-western China, particularly to the west of 105°E. ② Increase the number of monitoring wells or springs up to approximately 1000. ③ Improve the quality of monitoring network, eliminate and transform those wells or springs that do not meet for the standards and requirements at all. ④ Optimize the monitoring items, focus on the monitoring of the wells or springs flows, the soil vapor in the vicinity of faults (main parameters are H₂, He, CO₂), and construct a soil vapor network. ⑤ Optimize the existing monitoring modes, establish the plane array observation and vertical multi-level three-dimensional observation. ⑥ Improve the existing digital monitoring technology.