2000年12月21日,宁波地震台ZK03井增加水温测项（＂九五＂水温）,2010年4月2日,在同一井孔内同一深度又增加水温仪器（＂十五＂水温）进行平行观测。结果发现,2套仪器初装时的水温绝对精度测值基本相同,说明该井水温10年来的趋势性上升不是井孔内水温度的变化,可能是仪器的系统性变化引起的,即仪器的漂移现象所致,但对地震前兆观测是没有明显影响的。通过近9个月的平行观测,发现2套仪器测值的趋势性变化基本一致。在受到雷电和交流电脉冲干扰时,2套仪器水温测值出现了不同的变化形态,可能与每套观测仪器的系统特性有关。由于安装＂十五＂水温仪而对＂九五＂水温测值的干扰表明,＂九五＂水温仪虽然经过10余年的连续运行,但传感器的灵敏度还是很高的,可以继续使用。

On December 21,2000,Ningbo seismic station ZK03 well started the test of the water temperature（a ninth ＂Five-year Plan＂ water temperature project）.Ten years later on April 2,2010,in the same well at the same depth a new set of water temperature instrument was installed to start the parallel observation（the tenth ＂Five-year Plan＂ water temperature）.The results show that the absolute precisions of the water temperature measurements are basically the same at the installments of the instruments,which means that the well water temperature rising trend in ten years is not the result of the temperature change of the well hole internal waters,but that of the instrument systemic changes,namely the instrument drifts,and has not obvious influence on earthquake precursory observations.Through nearly nine months of parallel observation,the two sets of instruments are generally consistent in the measure value trend.When interfered with lightning or electrical impulses,they showed different water temperature measurements,and this may have something to do with the systematic characteristics of each instrument.In spite of the interferences of the water temperature measurements of the ninth ＂Five-year Plan＂ water thermometer by the tenth ＂Five-year Plan＂ one,the sensitivity of the former is still high although it has worked continuously for more than ten years.[著者文摘]