摘要
利用民乐地区流动观测大地电场仪(ZD9A)观测的资料,通过均值法、归零法、谱分析法等数理方法处理,结合天水地磁资料除去磁暴对地电场资料影响,2003年10月30日在民乐-山丹MS3.9地震前异常变化明显。
The data of the fluxion telluric field equipment (ZD9A) in Minle area have been analyzed using the average value method,the method of return zero and the spectra analysis. And the influnce of magnetic storm to the data have been removed according to the terrestrial magnetism data of Tianshui station. The results show that there exits obvios anomalies before the strong aftershock MS3.9 in Oct. 30,2003 after Minle earthquake.
引文
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