基于舒曼谐振监测地震前兆异常机理研究

项目名称： 基于舒曼谐振监测地震前兆异常机理研究

项目编号： No.61201016

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 电子学与信息系统

项目作者： 于海雁

作者单位： 哈尔滨工业大学

项目金额： 25万元

中文摘要： 大地震前存在电离层前兆现象已经被众多研究成果所证实。地球电离层空腔中由于雷电激发形成的舒曼谐振波在大地震前被发现存在异常现象，日本学者对该现象进行了统计研究，认为舒曼谐振异常与陆地地震具有良好的对应性，并对舒曼谐振异常现象的产生给出了假设机理，认为舒曼谐振异常与地震电离层前兆有关。本项目通过采用FDTD仿真地球电离层波导中舒曼谐振波的传播，仿真电离层电导率不规则体对舒曼谐振传播特性的影响。通过研究全球雷暴源产生的舒曼谐振波在波导中的传播和散射，建立震前舒曼谐振异常机理模型。对电磁建模仿真结果与实测数据进行对比研究，验证震前舒曼谐振异常的产生机理假设。研究成果可以为地震电离层前兆监测提供学有效的监测方法，同时为基于舒曼谐振的监测方法提供科学的布站方法。

中文关键词： 舒曼谐振；地震电离层扰动；电离层非对称结构；干涉；

英文摘要： The existing of earthquake precursor in ionosphere has been confirmed by many researching results. Schumann resonances are global electromagnetic resonances, excited by lightning discharges in the cavity formed by the Earth's surface and the ionosphere.The anomalous behavior of Schumann Resonance was observed in Japan before earthquake. The statistical analysis of those Schumann resonance anomalies in possible association with earthquakes was provided by Japanese researchers. They found that the land earthquakes with large magnitude are found to trigger the anomalous Schumann resonances. Then the mechanism hypothesis of anomalies was presented by them. Here, we adopt FDTD to simulate the Schumann resonance wave propagation in the earth-ionosphere cavity. The propagation anomalies of Schumann resonance wave is simulated through introducing the ionospheric conductivity regularity into the propagation model. The mechanism model will be built through the simulation that Schumann resonance wave propagation and scattering in the waveguide is generated from global thunderstorm source. The simulation results will be compared with the real observation. So the mechanism hypothesis can be verified. The research results can provide the scientific and effective methods of monitoring earthquake based on Schumann Resonance and

英文关键词： Schumann Resonances；earthquake ionospheric perturbation；ionospheric asymmetric construction；interference；