【摘要】 本文使用云南省滇西地区,红河断裂带北端1982—1984年由PDR—2数字事件记录仪记到的77个地震的记录图,用美国加州的技术计算了这些地震的地震矩M₀,伍—安地方震震级M_L。对于1（1/2）≤M_L≤3（1/2）,得到logM₀与M_L的关系为logM₀=16.97+（1.17±0.05）M_L。与美国中加州的logM₀与K_L的关系一致。将得到的M_L与云南省使用的震级M（持续时间震级）,M（振幅震级）比较,发现对这些地震,云南省的震级一般都比M_L大,对于1.7≤M≤5.3,M_L=0.49+（0.67±0.04M）,logM₀=17.30+（0.86±0.04）,对于2.0≤M≤5.4,M_L=0.24+（0.76±0.05）M,logM₀=17.06+（0.95±0.05）M。更多还原

【Abstract】 Seismograms and accelerograms from 77 earthquakes in 1982-1984 near the northwest end of the Red River fault in western Yunnan Province, the People’s Republic of China, have been used to calculate seismic moment Mo, and local magnitude ML, using techniques established in California.For events of 11/2≤ ML≤31/2, log Mo = 16.97 + (1.17±0.05)ML, consistent with the log Mo-ML relation appropriate for central California. A comparison of these ML, values and the coda duration magnitudes M and S-wave amplitude magnitudes M assigned by the Seismological Bureau of Yunnan Province suggests that M and M values are generally larger than the Mi values. For 1.7≤M≤5.3, ML = 0.49 + (0.67±0.04)M and log Mo= 17.30+ (0.86±0.04)M. For 2.0≤M≤ 5.4, ML = 0.24+(0.76±0.05)M and log Mo=17.06 +(0.95±0.05)M.更多还原