分析研究了华北北部地区近几年内发生的3次中强地震前后距其震中一定范围内的地电阻率异常现象及其特征。
The earth resistivity anomalies and its features before 3 moderate earthquakes occurred in some rangearound the epicenters in the north of North China of recent years are analyzed.
结果表明，地电阻率各向异性度(S)异常变化中的地震前兆信息量大于地电阻率异常变化中的地震前兆信息量。
The results show that more information was received from the variation of s than from that of ground resistivity.
研究表明，中强地震地电阻率异常特征非常复杂，异常的时间一般只有60—90天，异常的幅度也只有1%—2%。
The telluric resistivity anomaly of moderate strong earthquake has a complicated feature, the length of the anomaly duration is only 60-90 days, the amplitude of the anomaly is 1-2%.
可提供视电阻率、阻抗相位、异常相位等地电学参数。
Parameters of apparent resistivity, impedance phase, and anomaly phase can be acquired.
自动地电阻率法在探测地下老窑巷道等地质异常体中，当异常体的埋深增加时，其相对视电阻率曲线的异常会逐渐变得平缓而且模糊。
In detection of underground old kiln roadways and geological bodies by automatic earth resistivity method, the anomalies gradually become smoothly and fuzzy with their depth.
其二是如果给出了大地电阻率，则可计算时间域的航空电磁响应，因此可以校正由飞行高度改变引起的假异常。
The second is to estimate the time-domain airborne E. M. response, if the earth resistivity is given; therefore the pseudo-anomalies caused by the change of the flying altitude will be corrected.
其二是如果给出了大地电阻率，则可计算时间域的航空电磁响应，因此可以校正由飞行高度改变引起的假异常。
The second is to estimate the time-domain airborne E. M. response, if the earth resistivity is given; therefore the pseudo-anomalies caused by the change of the flying altitude will be corrected.
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