摘要
根据不同作者对同一地震震源机制解的不同测定结果之间的差异程度来估计测定结果的相对可信度。用此方法对１９８５年ＩＡＳＰＥＩ东京会议选定的５１个地震不同作者测定的结果作了分析，同时也对我国有两个以上测定结果的震源机制解答作了分析，结果说明，我国现有震源机制解答测定精度总体上有待提高。用５°×５°×５°的格点尝试法重新处理了国家地震局震源机制研究小组１９７３年所著《中国地震震源机制研究》第一集中所载除台湾地震和深震外的２２９个地震的Ｐ波初动方向数据，最后只得出了４７个可供参考的震源机制解答。
Relative reliability of earthquake focal mechanism (FM ) solutions is estimated using thediscrepancy between different determinations by different authors. This method is applied to FM solutions of the 51 IASPEI (Tokyo, 1985) selected earthquakes, as well asto the available solutions of Chinese earthquakes. The results indicate that the precisionof Chinese FM determinations is generally to be greatly improved. FM solutions of 229Chinese earthquakes are redetermined based on the P wave polarity readings collected in1973 by the FM research group of the State Seismological Bureau of China. From the 229processed data set only 47 FM solutions, which may be used for reference by other studies, have been obtained.
出处
《地震地磁观测与研究》
1994年第5期1-9,共9页
Seismological and Geomagnetic Observation and Research
基金
国家地震局85-05-02-01-01项目
关键词
震源机制
测定
地震
focal mechanism, determination, China
