【摘要】 笔者曾指出存在一种震前由孕震区发出的地下构造中的超低频密度—应力波,而且这种波的性质与国外学者提出的"热力学弹性回跳"理论符合得很好,并列举了天文时纬残差、地下深部物质视电阻率和震前地壳突变性形变3个方面的观测证据来证明这种波的存在。我们进一步发现,我国地震工作者在对地震的长期观测和监视工作中,实际上已经获得了支持存在这种震前超低频密度—应力波的很多实测结果。大量实测数据既是这种波存在的证据,又是研究这种波的性质的第一手资料。本文将与震前超低频密度—应力波的特征符合得较好的实测资料择要列出,并与该波的特征相比较。分析表明,这些测量所反映的很可能就是这种震前超低频密度—应力波,因此也就反映了这种波的波源—震前缓慢而剧烈的地下介质扰动。更多还原

【Abstract】 We have argued that there is a density—tectonic stress wave with ultra-Low frequency before earthquakes(WULF),which characters are agree well with the thermodynamical elastic-rebound model suggested by Rundle.Three kinds of real observational materials have been sampled:the astrometric residual anomalies of universal time and latitude,the anomalies of earth apparent resistivity,as well as the crustal deformation prior to earthquakes,to verify the existence of WULF.We now find that in the long period of observations and monitoring of earthquakes in China,more materials,which could indicate WULF,had been obtained and published.We compare the characters of WULF and several different kinds of real observational materials selected and depicted in this paper,it is deemed that the source of WULF might be the very slow but fierce disturbance of density and tectonic stress underground.更多还原