【摘要】 通过对印度尼西亚地区2004年12月26日苏门答腊—安达曼M9.0地震前后地震b值的计算。我们得出这一地区苏门答腊—安达曼地震前后的地震b值的变化曲线。计算得到在地震b值变化的各阶段中各级地震的数目占各段地震总数的比例。得出在苏门答腊—安达曼地震前后,这一地区中、强地震增加了。更多还原

【Abstract】 The b value in the Indonesia region during the period of the Aceh earthquake of M9.0,which occurred on December 26,2004 made known the ratio of the number of various magnitude earthquakes in various phases.It shows that the numbers of both the moderately strong and the strong earthquakes increased in this region.更多还原