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山东安丘电感法地应力站位于郯芦断裂带上。自1969年9月开始观测以来已有十二年的资料。1978年仪器室改建成恒温室,安装了简易温度调节装置,全年大部份时间室内温度保持在20℃,夏季温度可29.5℃。观测曲线呈现规律的年变化形态。1981年8月中旬深、浅两个井孔三个方向上的六个元件观测值同时出现程度不同的逐渐下降变化,改变了原正常的年变形态。其中尤以灵敏度较高的 NE60°向元件测值下降幅度较大,至9月上旬最大变化幅度分别为250和150微亨(图1)。观测时仪器萤光屏上出
Shandong Anqiu inductive ground stress station is located in the Rulu fault zone. Twelve years have passed since the observation began in September 1969. In 1978, the instrument room was converted into a constant temperature room and a simple temperature control device was installed. During most of the year, the indoor temperature was maintained at 20 ℃ and the summer temperature was 29.5 ℃. The observation curve shows a regular pattern of annual changes. In mid-August 1981, the observation values of the six elements in the three directions of deep and shallow boreholes all appeared at the same time gradually decreased and changed in different degrees, changing the original normal deformation state. In particular, the NE60 ° with higher sensitivity dropped significantly toward the component measurement, with the maximum changes of 250 and 150 micro-hectares respectively in the first ten days of September (Figure 1). Fluorescent screen when the instrument out on observation