【摘要】 将辽宁地区(38～44°N,119～125°E)按2°×3°分成四个区,采用单事件多台站观测联合求解波速比的方法,利用P、S波到时记录,计算了1999年11月辽宁岫岩Ms5.4和2000年1月Ms5.1地震、2003年3月沈阳ML4.1地震前后及近两年以来辽宁地区的波速比,结果显示辽宁地区中等地震前波速比出现低值异常,波速比低值异常区与辽宁地区的中等地震有一定的对应关系,可以作为辽宁地区预报中等地震的参考指标。更多还原

【Abstract】 Liaoning region(38°～44°N,119°～125°E) is divided into 4 sections,in which each section has the range of 2°×3°in this paper.Using the multi-station united method we calculated the P and S waves arrived time and educed the velocity ratio in the periods of Xuyang Ms5.4 in November 1999 and Ms5.1 in January 2000,Shengyang ML4.1 in March 2003 and recent two years 2005~2006.The result shows that there is a low value area of velocity ratio before moderate earthquakes,which is well corresponding to the moderate earthquakes in Liaoning region,so it can be served as the reference guideline of predicting moderate earthquake in Liaoning region.更多还原