ASPEI宽频带面波震级与传统面波震级的对比*
杨晶琼,杨周胜,蔡明军,许亚吉,梁 勇

(云南省地震局,云南 昆明650224)

宽频带面波震级MS(BB); 面波震级MS; 震级测定; 震级转换

Comparison between the IASPEI Standard Broadband Surface Wave Magnitude and Traditional Surface Wave Magnitude
YANG Jingqiong,YANG Zhousheng,CAI Mingjun,XU Yaji,LIANG Yong

(Earthquake Administration of Yunnan Province, Kunming 650224, Yunnan, China)

broadband surface wave magnitude MS(BB); surface-wave magnitude MS; magnitude determination; magnitude conversion

备注

应用IASPEI新推荐的宽频带面波震级MS(BB)标准,选取云南数字地震台网记录到的2000～2011年云南及周边地区4.0级以上的433个地震事件为研究对象,测定其宽频带面波震级MS(BB),同时也重新测定面波震级MS,并采用线性回归和正交回归方法,对MS(BB)与MS进行对比分析研究,得到了它们之间的回归关系式。结果 表明:MS比MS(BB)系统偏高,当震级较大时,二者之间差别也偏大。

We applied the new broadband surface wave magnitude MS(BB) standard recommended by IASPEI to determine the broadband surface wave magnitude MS(BB), and re-determine the surface wave magnitude MS of the selected 433 M≥4.0 seismic events in Yunnan and its adjacent area recorded by Yunnan Digital Seismic Network from 2000 to 2011. Then we compared and analyzed MS(BB) and MS by using linear regression and orthogonal regression method, and obtained the relationship between them. The results show that MS is higher than the MS(BB) for the same earthquake, and the difference between them is large when the magnitude is lager.