【摘要】 本文使用1982年以来云南省常规地震台网39个台站的地震资料,对云南省地方震震级测定的偏差作了一定的估计与讨论。并给出了震级 M_L 测定的偏差统计,计算了主要台站的台站校正值,得到单台震级与平均震级的偏差在δM=±0.2级范围内的概率为52.2%;在δM=±0.5级范围内的概率为84.7%。平均统计标准差为0.35,经校正后为0.25。台站校正值均在±0.2级以内,一般不超过±0.4级。最后,比较了常规台网震级 M_L 与电信传输台网持续时间震级 M_d 的差别,并给出其线性回归关系 M_L=0.8M_d+0.6。更多还原

【Abstract】 In thit paper, using the seismic data since 1982 from 39 stations of the conventional network in Yunnan Province, the evaluation and discussion have been carried out to some extent on errors in local magnitude determination in the province. At the same time, the statistical errors of magnitude ML determination have been presented and the station correction values for major ones have also been calculated. The obtained results are as follows: errors ranging magnitude δM=±0.2 between single station magnitude and the average are with a probability of 52.2%; and ranging δM=±0.5, of 84.7%. The standard error of statistical average is 0.35, with most of station correction values ranging within magnitude±0.2, generally without values over±0.4. Finally, through a comparison between magnitude ML from the conventional network and the coda duration magnitude Md from the telemetering network, the linear regressive relation ML = 0.8 Md+0.6 is obtained.更多还原