| 潮汐地电场谐波和各向波形的影响要素 |
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| 引用本文： | 谭大诚,王兰炜,赵家骝,席继楼,刘大鹏,于华,陈军营.潮汐地电场谐波和各向波形的影响要素[J].地球物理学报,2011,54(7):1842-1853. |
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| 作者姓名： | 谭大诚 王兰炜 赵家骝 席继楼 刘大鹏 于华 陈军营 |
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| 作者单位： | 1. 中国地震局兰州地震研究所,兰州 730000;
2. 中国地震局地震预测研究所兰州科技创新基地,兰州 730000;
3. 中国地震局地壳应力研究所,北京 100085;
4. 中国地震局地震预测研究所,北京 100036;
5. 中国地震局江苏省海安地震台,江苏海安 226600 |
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| 基金项目： | 国家科技支撑计划专题项目，地震行业专项项目 |
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| 摘 要： | 潮汐地电场表现出近正弦形态,形态持续全天属TGF-A型,只在午前午后出现属TGF-B型,两类潮汐地电场前5阶谐波周期分别是23～24、12、7.9、6、4.8h.不同场地的潮汐地电场振幅谱可能有差异,周期变化的径向、切向月球潮汐力的振幅谱也存在差异.岩石裂隙面分布不同,则各向潮汐力对裂隙的作用效果不同,这可能是导致潮汐...
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| 关 键 词： | 潮汐地电场 谐波 各向波形 裂隙 应力场 |
| 收稿时间： | 2010-10-15 |
Influence factors of harmonic waves and directional waveforms of tidal geoelectrical field |
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| TAN Da-Cheng,WANG Lan-Wei,ZHAO Jia Liu,XI Ji-Lou,LIU Da-Peng,YU Hua,CHEN Jun-Ying.Influence factors of harmonic waves and directional waveforms of tidal geoelectrical field[J].Chinese Journal of Geophysics,2011,54(7):1842-1853. |
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| Authors: | TAN Da-Cheng WANG Lan-Wei ZHAO Jia Liu XI Ji-Lou LIU Da-Peng YU Hua CHEN Jun-Ying |
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| Institution: | 1. Lanzhou Institute of Seismology, China Earthquake Administration, Lanzhou 730000, China;
2. Lanzhou Base of Institute of Prediction, China Earthquake Administration, Lanzhou 730000, China;
3. Institute of Crustal Dynamics, China Earthquake Administration, Beijing 100085, China;
4. Institute of Prediction, China Earthquake Administration, Beijing 100036, China;
5. Haian Seismostation, Earthquake Administration of Jiangsu Province, Jiangsu Haian 226600, China |
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| Abstract: | The waveform of tidal geoelectrical field is an approximate sine wave. The TGF-A waveform appears in all-day and the TGF-B only appears in the prenoon-postnoon. The first 5 order harmonic period of the waves is 23~24, 12, 7.9, 6 and 4.8 h. On different sites, the amplitude spectrum of tidal geoelectrical field could be different. The vertical tidal force and the horizontal tidal force, being produced by moon, change periodically, whose amplitude spectrums are also different. To the different directions of crack plane, the tidal forces gives different effect. This could be the reason for the different amplitude spectrum of tidal geoelectrical field. On the same site, the obvious difference of the directional waveform characteristics in wave amplitude and stability could be caused by the preferential orientation of cracks. The wave amplitude of tidal geoelectrical field is much larger and stable along the preferential orientation, and on the contrary, the wave amplitude is smaller and could be unstable in the direction vertical to the cracks. The cracks of mesh shape could cause similar waveform characteristics in all directions. The characteristics and amplitude spectrums may be used to estimate water seeping direction and crack plane direction. The analysis result of dominant crack orientations on several sites is basically consistent with regional or local stress field. |
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| Keywords: | Tidal geoelectrical field Harmonic wave Directional waveforms Crack Stress field |
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