- 责任者：Yang Jingqiong (Earthquake Administration of Yunnan Province ; Kunming 650224 ; China) ; Yang Zhousheng
- 刊名：Earthquake Research in China
- 出版年：2013
- 卷期：29(4)
- 关键词：震级 ; magnitude ; 面波法 ; surface wave methods ; 云南 ; Yunnan Province
- 页码：p.513-521
- 图表：5 illus., 3 tables, 13 refs.
- 分类号：0500
- issnNo：ISSN1001-4683
- isbnNo：CN11-2008/P
Seismic station records of M ≥ 4.0 earthquakes in the Yunnan Regional Digital Networks in 2000 ～2011 were used to determine near earthquake magnitude ML and wave magnitude Ms of 433 earthquake waveform data.The speed data were simulated：near earthquake magnitude ML was simulated in terms of short cycle seismographs by DD-1 records,and surface wave magnitude Ms in terms of the long cycle seismographs by SK records.All the ML and Ms data were then man-checked with linear regression and orthogonal regression and obtain the conversion formula between them.Results showed that the formula Ms =1.13ML-1.08 used since the 1970s may cause problems when applied to the Yunnan region.The adjusted formula of Ms =1.13ML-0.86 is more applicable as the new conversion relationship.Meanwhile,the comparison between the recorded data from Yunnan seismic network and the national seismic network shows the ML difference of-0.2 ～ 0.4 in most of these data with 0.2 as the majority and Ms difference between-0.4 ～ 0.2 with-0.2 as the majority.