摘要
本文将加卸载响应比理论与地震活动性结合对永善地震前的时间域和空间域的加卸载响应比特征进行了研究，结果表明：（１）震前几年的加卸载响应比Ｙ值在空间域形成高值区的环形分布，立体图为“群峰凸起”，而无强大地震的区域的Ｙ值立体图为“一马平川”；（２）震前形成的地震活动增强区内的Ｙ经历一个“高值—低值—升高”的过程，（３）Ｙ高值区在空间域向主震震中迁移和在时间域向主震逼近。这些特征对强大地震的时间和地点预测具有重要的意义，因此利用同样的思路对１９７７—１９９４年间出现的地震活动增强区作了预测。
In this paper we combine the load-unload response ration theory with seismicity to study the spacio-temporal characteristics before Yongshan earthquake. We find out that (1) stereoscopic drawing of Y values, the load-unload response ration, several years before the major shock shows ring distributon for high value region, looking like 'surrounded by hills',however, the one without strong earthquake followed seems 'a wide expanse of flat land'; (2) the Y value in enhanced formed before strong earthquake experienced a process of 'high-low-raising again'; (3)the region with high Y value moves to the epicenter of major shock in space and approaches the time of the major shock occurance in temporal domain. All of these characteristics have a vital significance to predict the location and time of strong earthquake. Based on the idea we had predicted the enhanced region of seismicity appearing from 1977 to 1994.
出处
《地震研究》
CSCD
北大核心
1996年第2期134-139,共6页
Journal of Seismological Research
