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金沙江下游水库区地震地下水动态监测网(简称金沙江水网)布设在金沙江下游向家坝水库区与溪洛渡水库区内,共有6口观测井,同时观测井水位与井水温动态。2012年9月7日云南省彝良MS5.7地震前有4口井水位与水温动态表现出明显的下降型异常,异常的时间大体上同步,异常的幅度较大,与地震的对应关系较好。金沙江水网的水位、水温动态干扰较多,特别是降雨干扰十分明显,在这样不利的条件下出现如此明显的异常,除了井震距较小外,可能与观测区与孕震区同处同一个地震构造带有关。
The groundwater dynamic monitoring network of the Jinsha River downstream reservoir area (Jinsha River water network) is located in the Xiangjiaba Reservoir Area and the Xiluodu Reservoir Area in the lower reaches of the Jinsha River. There are 6 observation wells, and the water level and well water temperature are observed. On September 7, 2012, the water level and water temperature of four wells before the MS5.7 Yiliang, Yunnan Province showed significant descending anomalies. The anomalous time was generally synchronous and the anomalous amplitude was larger than that corresponding to the earthquake it is good. Jinsha River water network water temperature and water temperature more dynamic interference, especially rainfall interference is very obvious, such adverse conditions appear so obvious exception, except for the well spacing is small, it may be the same with the observation area and seismogenic zone A seismic tectonic belt is related.