A Study on Crustal Activity Detecting System and Construct ion of EM Field Measuring Network

研制并验证了测量ELF频段磁场的高灵敏度、高防雷传感器。我们发现我们测得的地震波受到了地震的影响。提出了利用隐马尔可夫模型(HMM)从日变化模式中检测异常的方法，并证明了该方法的有效性。提出了基于拟LL范数的信号分离方法，并验证了该方法的有效性。我们表明，微弱但异常的电磁辐射能够通过关注方位角标准差来检测。

We developed and verified the high-sensitive andhigh-thunder-proof sensor measuring the ELF band magnetic field. We showed that thesferics measured by us were modulated by the earthquake. We proposed the method of detecting anomaly from the daily variation pattern using Hidden Markov Model(HMM), and showed validity. We proposed the signal separation method based on quasi-Ll norm, and showed validity. We showed that weak but anomalous electromagnetic radiations were able to detect by focusing on the azimuthal standard deviation.