【摘要】 在本文中叙述了地震地电学方法判断地震活动趋势的８条指标：１．电性前兆出现的部位；２．地电年变化背景场；３．地震地电阻率ρｓ的早期下降变化；４．中期平稳波动变化；５．短期加速下降变化；６．临震快速回返（地震发生）变化；７．电性多参数无量纲前兆；８．Δ·Ｔ的对数与Ｍ之间的统计关系。更多还原

【Abstract】 The paper depicted eight criteria to asslss seismicty tendency by using earthquakegeoelectrical method: (1) region of producing geoelectrical precursors, (2) awhual variation of backdrop field of geoelectrical resistivity (ρs), (3) earlly descending variation of ρs (4)medium-term stationary variation of ρs(5) short-term quicken descending variation of ρs(6) imminent quicken return (earthquake occurrence) variation of ρs(7), adimension precursor of geoelectrical multi-paramenter, (8) statistical relation between logarithm of Δ. T and M.更多还原