地电阻率长趋势变化及其预测意义

发布时间：2018-06-14 15:39

本文选题：地电阻率 + 趋势变化　；参考：《地震学报》2017年04期

【摘要】：为了深入研究地电阻率1年尺度以上趋势变化的区域性和同步性,本文从地电阻率与水位、水准的关系以及地电阻率固体潮现象的角度,通过理论、实验、实例分析了地电阻率趋势变化产生的原因.分析结果显示,地电阻率趋势变化与观测系统或水位(非构造水位)无关,而与周围构造变化有关,且趋势上升和下降分别反映了周围应力场的压性和张性变化.在此基础上,以高邮台和成都台为例,从地电阻率与周围地震的关系分析了地电阻率趋势变化的场兆特征,结果表明地电阻率在上升趋势转折时更具有短期的预测意义.本文结果可以为研究地电阻率的长期趋势变化现象提供参考;未来地震的预测需在综合各台站观测结果的基础上才能有效地判定区域应力场的方向和相对幅度,从而给出有意义的地震前兆预测结果.
[Abstract]:In order to deeply study the regional and synchronism of the trend change of earth resistivity over 1-year scale, the relationship between earth resistivity and water level, leveling and the phenomenon of earth resistivity solid tide are studied in this paper. An example is given to analyze the causes of the trend change of earth resistivity. The results show that the trend change of the earth resistivity is independent of the observation system or the water level (non-structural water level), but is related to the variation of the surrounding structure, and the upward trend and the decrease reflect the compressive and tensional changes of the surrounding stress field, respectively. On this basis, taking Gaoyou station and Chengdu station as examples, the field precursory characteristics of the trend change of earth resistivity are analyzed from the relationship between the earth resistivity and the surrounding earthquakes. The results show that the earth resistivity has more short-term prediction significance when the upward trend turns. The results of this paper can provide a reference for the study of the long-term trend change of earth resistivity, and the direction and relative amplitude of regional stress field can be determined effectively only by synthesizing the observation results of various stations in the future earthquake prediction. The results of prediction of earthquake precursors are given.
【作者单位】：江苏省地震局;南京基准地震台;
【基金】：中国地震局震情任务跟踪重点项目(1530503)资助
【分类号】：P315.722

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