利用云南地震台网记录的云南及其周边地区2000~2017年的宽频带数字地震资料，按照新的震级国家标准《地震震级的规定》（GB17740-2017）的测定方法，使用同一套软件，对地方性震级M_L、面波震级M_S、宽频带面波震级M_S（BB）、短周期体波震级m_b、宽频带体波震级m_B（BB）和矩震级M_W重新进行人工测量。并分别用一般线性回归和正交回归方法，对不同震级之间的关系进行对比，给出它们之间的经验关系式。研究结果表明：①当M<4.5时，各种震级之间相差不大，使用地方性震级M_L可以较好地表示地震的大小，也能够更加充分地反映区域特性；当4.5≤M<8.0时，宽频带面波震级M_S（BB）和矩震级M_W均能较好地表示地震的大小，但矩震级M_W的测定需要一定时间，因此在速报工作和大震应急中，可以使用M_S（BB）表示地震的大小；M_S（BB）的测定方法与国际接轨，消除0.2的震级偏差。②对于面波震级M_S和宽频带面波震级M_S（BB），由于面波测量的位置、计算公式和量归函数不同，M_S比M_S（BB）系统偏高0.2左右；短周期体波震级m_b较宽频带体波震级m_B（BB）整体偏小0.2左右，主要区别在于仿真模式。③宽频带面波震级M_S（BB）和宽频带体波震级m_B（BB）均在垂直向原始宽频带记录上直接测定，取消波形仿真环节，另外，相比测定m_B（BB）震中距要求大于5度，许多台站被限制，M_S（BB）更利于区域台网测定。④当3.5≤M_L≤6.5时，M_L较M_W整体偏大；M_S≥3.5时，M_S也较M_W整体偏大，且均随着震级增加，偏差值呈上升趋势。⑤当M≥8.0时，面波震级出现饱和现象，使用矩震级M_W表示M≥8.0地震的大小。

Using the broadband digital seismic data recorded by the Yunnan Digital Seismic Network in Yunnan and its surrounding areas during 2000~2017,according to the determination method of the New National Standard "Earthquake Magnitude Regulation" (GB17740-2017),the same set of software should be used to re-measure manually the local magnitude M_L,the surface wave magnitude M_S,the wide band surface wave magnitude M_S(BB),the short period body wave magnitude m_b,the wide band wave magnitude m_B(BB) and the moment magnitude M_W. The relationship between different magnitude is compared with the general linear regression and orthogonal regression methods respectively,and the empirical relations between them are given. The results show that there is little difference between the various magnitude:① When M<4.5,and the size of the earthquake can be better represented by the local magnitude M_L,and can reflect the regional characteristics more fully. When 4.5 ≤ M < 8.0,the wide band surface wave magnitude M_S(BB) and the moment magnitude M_W can better represent the magnitude of the earthquake. However,the determination of moment magnitude M_W takes a certain amount of time. So in the rapid reporting work and earthquake emergency response,M_S(BB) can be used to indicate the size of the earthquake. M_S(BB) determination method and international standards,eliminate 0.2 of the magnitude deviation. ② For surface wave magnitude M_S and wide band surface wave magnitude M_S(BB),the calculation formula and the regression function are different. The M_S ratio M_S(BB) system is about 0.2 higher. The short period body wave magnitude mb is smaller than the wide band Body wave magnitude m_B(BB),and the overall is about 0.2. The main difference should be in the simulation mode. ③ Wide band surface wave magnitude M_S(BB) and wide band wave magnitude m_B(BB) are directly measured vertically to the original wide band record,eliminating the waveform simulation link. In addition,compared to the determination of m_B(BB) epicenter distance requirements greater than 5 degrees,many stations will be limited. M_S(BB) is more conducive to regional network measurement. ④ When 3.5 ≤ M_L ≤ 6.5,M_L is larger than M_W as a whole. When M_S ≥ 3.5,M_S,M_W is also the overall size,and with the increase of the magnitude,the deviation value is on the rise. ⑤When M ≥ 8.0,the surface wave magnitude appears saturated,with the moment magnitude M_W to indicate the size of the earthquake with M ≥ 8.0.

P315

中国地震局地震科技星火计划项目（XH18043）资助