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中国东部六省地区 Lg 震级系统,m_(Lgz),m_(Lgh),m_(mxz)和 m(mxh),相互均呈良好的线性关系,便于互相换算.m_(mxh)可以取代东部六省原 M_L(ECH),并基本保持了 M_L(ECH)的震级水平.m_(mxh)约比南加利福尼亚的 M_L(SC)标度高0.36震级单位.通过 R_(max)(△)和云南 R_3(△)的比较,发现云南地区的 MAX 相约1秒γ值比东六省的约小1倍.并得到云南地区 MAX 震级校准函数.观测表明:在4—5级范围内,m_(mxh)=m_b.由此导出 m_b(中国东部)=m_b(美国西部).这与中国东部和美国西部的衰减因子 r 值大约相等的结果吻合.
The Lg magnitude systems, m_ (Lgz), m_ (Lgh), m_ (mxz) and m (mxh) in the six provinces of eastern China show a good linear relationship with each other, (MCH), which is about 0.36 magnitude higher than the M_L (SC) scale of Southern California.According to R_ (max) (△) and Yunnan R_3 (ECH) △), it is found that the γ value of MAX in Yunnan is about 1 times smaller than that in the eastern six provinces, and the MAX magnitude calibration function in Yunnan is obtained. The observation shows that in the range of 4-5, m mx = m_b This results in m_b (eastern China) = m_b (western U.S.A.) This is in agreement with the approximately equal attenuation factor r values in eastern China and western United States.