地震引发低电离层异常与舒曼谐振耦合机理研究

There is strong relevance with Schumann Resonance (SR) anomalies and earthquakes. And there are also other seismo-ionospheric abnormalities, including ionospheric parameters and electromagnetic radiation. the coupling mechanism research is the important work of short-impending earthquake prediction Therefore, this project aims to research the coupling mechanism of anomaly a in the lower ionosphere and the SR. First of all, considering influence of the 3 big earth flash sources on SR, the earth-ionosphere cavity model is improved. And the relationship of ionospheric parameters and SR distribution is studied. Then,the nonlinear effects in the lower ionosphere by SR is researched taking into account of the magnetic field. And also the nonlinear effect of electromagnetic radiation of various frequency band and the SR is studied.Combined with other abnormal phenomena in ionosphere, the coupling model of seismo-ionospheric anomaly and SR in the low ionospheric is researched. The research results will further explain the mechanism of various electromagnetic disturbances before earthquakes, and provide the theoretical basis for the short-term earthquake prediction.

舒曼谐振(SR)异常与大地震有强关联性，而震前电离层同时存在各种其他异常，包括电离层参数异常和电磁辐射等，研究这些异常的耦合机理是当前短临地震预测的重要工作。因此，本项目拟开展对低电离层异常与舒曼谐振的耦合机理研究。首先，考虑地球3大闪电源区对舒曼谐振的影响，改进并完善地-电离层谐振模型；并研究电离层参数与舒曼谐振分布的关系；然后，考虑地磁场存在条件下舒曼谐振在低电离层的非线性效应，研究各频段电磁辐射与舒曼谐振的非线性作用。综合其他电离层异常现象，研究低电离层异常与舒曼谐振的耦合模型。研究结果将进一步解释震前各种电磁扰动的产生机理，为短临地震预测提供理论依据。

舒曼谐振(SR)异常与大地震有强关联性，而震前电离层同时存在各种其他电磁异常，包括电离层参数异常和电磁辐射等，研究这些异常的耦合机理是当前短临地震预测的重要工作。因此，本项目开展了对低电离层异常与舒曼谐振的耦合机理研究。首先，考虑地球3大闪电源区对舒曼谐振的影响，改进并完善地-电离层谐振模型；得到了舒曼谐振的幅度和相位的分布；研究了考虑地磁场存在条件下舒曼谐振在低电离层的非线性效应，对ULF-UHF频段的电离层非线性作用做了定量研究，得到了各频段电磁辐射与舒曼谐振的非线性作用的调制度量级。分析了基于ELF和HF观测方法的舒曼谐振信号提取方法，并结合现有的地震异常数据，研究了低电离层异常与舒曼谐振可能的耦合机制。