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最近葛焕称等测定了中国东部苏豫皖冀浙六省地区约1HzLg波的衰减,得出波的衰减系数,对于Lg波埃里相,γlg=0.00435±0.00010km~(-1):对于lg波非埃里相(MAX相),γmax=0.00305±0.00010km~(-1)。陈培善和秦嘉政(1983)用残差法测定了云南地区短周期仪器记录S波最大振幅的震级校准函数R_3(Δ)。若利用Lg波MAX相的地动振幅A随震中距Δ的衰减模式
Recently, Gehuan et al. Determined the attenuation of about 1 Hz of Lg waves in the six provinces of eastern Jiangsu, Jiangsu, Anhui, Hebei and Zhejiang provinces and obtained the attenuation coefficient of the wave. For the Lg wave Erie phase, γlg = 0.00435 ± 0.00010km -1: lg wave phase of the non-Erie (MAX phase), γmax = 0.00305 ± 0.00010km -1. Chen Peishan and Qin Jiazheng (1983) measured the magnitude calibration function R_3 (Δ) of the maximum amplitude of S-wave recorded by short-period instruments in Yunnan Province by residual method. If we use the Lg wave MAX phase of ground motion amplitude A with epicenter distance Δ attenuation mode