在一些简易地电仪观测值中,一般包括了以下几个部份,即年变、干扰因素、仪器误差及地震信息等。年变是比较容易识别的,但要从观测值中提取其中因地震引起的异常,必须对干扰因素有较正确的分析和认识,并给予适当的处理。在干扰因素中目前看来大气降水确是某些地区主要的一部分。下面就自贡地区近 In some simple electrical observations, generally include the following parts, namely, change, interference factors, instrument error and seismic information. Yearly changes are relatively easy to identify. However, to extract the anomalies caused by earthquakes from the observed values, we must make a more accurate analysis and understanding of the disturbing factors and give appropriate treatment. Precipitation in the atmosphere at the moment seems to be a major part of the disturbances. Below Zigong area near