问题的提出 渤海、海城、唐山大震前在天津及其周围都曾部署着十多口水化学观测井,但每次震前有明显前兆反映的井却比较少;同时在华北盆地北部星罗棋布着上万口石油井和抽水井,大震前有明显反映的也是屈指可数。而在为数不多的前兆井中,却给我们提供了突出而可靠的地震孕育信息。在水化学井中有的震前水氡或气体总量成倍增长,有的由于气体过多,水变为乳白色。在石油井中有的震前突然发生井喷高达20米,十里之外都能听 PROBLEM PROBLEMS There have been more than a dozen saliva chemical wells deployed in and around the area before and after the earthquake in Bohai Sea, Haicheng and Tangshan, but fewer obvious precursors were reflected before the earthquake; at the same time, there were a large number of wells in the northern part of the North China Basin Tens of thousands of oil wells and pumping wells, there are clearly reflected before the earthquake is also a handful. In one of the few precursor wells, however, we have provided us with outstanding and reliable earthquake information. Some wells in hydration wells before the earthquake radon or gas multiplied by the total, and some due to gas too much, the water turned milky white. Some wells in the oil well before the sudden blowout up to 20 meters, can listen to ten miles away