自2012年7月21日18时起，徐州地震台体应变和分量应变同时出现较大异常变化，分析认为，此异常变化由距该地震台700m处泰山新打水井抽水干扰所致，不是地震前兆异常。

After 18pm in July 21, 2012,the body strain and the borehole strain of Xuzhou appear larger change, that change attracted us and the relevant department’s attention, after a lot of hard work, we find out the anomaly is a new wells’ pumping that about 700maway from our station, and we find out that different distances of the two wells’ pumping made different effects to our body strain.