【摘要】 地震前兆涉及到多种地球物理观测方法,且计量单位各不相同,因此,各类前兆异常之间无法进行直接的定量对比,这给地震预报研究带来了困难.应用异常从属函数值(无量纲量)可统一规划不同性质、不同计量单位的地震前兆异常.本文通过研究地磁资料从属函数,发现1995年9月20日山东苍山Ms5.2级地震前有明显的前兆异常.增强了对地震前兆异常的识别能力,文中提出该方法在地磁场研究中应注意的问题.更多还原

【Abstract】 The earthquake precursors are related to various geophysical observational techniques and their metric units are also different. Therefore, the direct quantitative comparistion among various precursory anomalies is impossible. This brings difficulty to predict earthquake. Aimed at this technical difficulty, anomaly subordinate function μ(non-dimensional value) is used to normalize precursory anomalies of different property and metric units. Based on the calculation of subordinate function with the geomagnetic data Cangshan earthquake of M s5.2 (sept.20,1995) has obvious precursory anomalies. The recognition of true anomalies is improved. Some questions are proposed and must be paid attention in applying magaetic precursors for eaithquke predition.更多还原