Abstract: In the experiment of digitalized comprehensive observation of groundwater in a single well at Ningde Seismic Station, by using “constant flow” observation method in a single well, a continual observation of groundwater radon density and the real-time dynamic water level is realized with a complete-set relative technical system, and it is recorded that both have an in-phase half sunny wave dynamic matching with object tide. The analysis holds that it provides, on one hand, a new observation fact for a basic study of forecasting seismic dynamics concerning the underground water, and, on the other hand, a new way to explore a research thinking, which tries to use the comprehensive observation and find a useful identification of interference and information before an earthquake.

Key words: Groundwater layer, Real-time dynamics, Tidal phenomenon, Digitalized comprehensive observation in a single well