中国东部六省 Lg 波振幅比 H/Z 和台站项/
Lg AMPLITUDE RATIOS H/Z AND STATION TERMS IN THE SIX EASTERN PROVINCES OF CHINA
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摘要: 根据中国东部六省80个台的约1Hz Lg 波振幅资料得出,Lg 波水平与竖直分量之比1g H/Z 值平均为0.13.对于松散沉积、花岗岩和沉积岩类台基,1g H/Z 值分别平均为0.55,0.04和0.10对此三类台基,水平向振幅台站项 Ch,分别平均为0.65,-0.09和0.00;竖直向振幅台站项 C2分别为0.32-0.04和0.00.Ch,CZ 和1gH/Z 间存在关系 Ch=0.01+2.10Cz和 Ch=-0.15+1.46 1gH/Z.Abstract: Using the data set of about 1 Hz Lg amplitudes from 80 stations in the six eastern provinces of China, the ratios of horizontal to vertical amplitude of Lg waves, H/Z are determined.The mean lg (H/Z) value is equal to 0.13.For the station bases of soft deposits, granite and sedimentary rock, lg (H/Z) values average 0.55, 0.04 and 0.10 respectively. For these three kinds of station bases, the station terms of horizontal amplitude, Ch average 0.65, - 0.09 and 0.00 ; that of vertical amplitude, C2 average 0.32,-0.04 and 0.00,respectively. And the relations between Ch,C2 and lg (H/Z) are : Ch=0.01 + 2.10 C2 and Ch = -0.15+ 1.46 1g (H/Z).
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[1] Chcn,P. S. and Nuttli.O.W,1984 .Estimates of magnitudes and short一period wave attenuation of Chinese earthquakes from modified Mercalli intensity data .Bull.Seism.Soc .Amer,74,957——968.
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[8] Amstadter , B. L.,1978.可靠性数学(彭兴文译)28.科学出版社,北京.
[9] Bath,M.,1979 .Teleseismic magnitude relations. Seismol.lnst.Uppsulcr Report,No.2——79,37.
[10] 陈培善、秦嘉政,1982 .量规函数、台站方位、台基及不同测量方法对近震震级M1的影响.地震学刊,1:6——15.[1] Chcn,P. S. and Nuttli.O.W,1984 .Estimates of magnitudes and short一period wave attenuation of Chinese earthquakes from modified Mercalli intensity data .Bull.Seism.Soc .Amer,74,957——968.
[2] 葛焕称、黄才中、叶培元, 陆振飞,1987.中国东部六省的Lg震级(上)测定方法和结果.地震学报,9. 37——51.
[3] Gupta.I. N, and Mclaughlin. K. L——1987. Attenuation of ground motion in the eastern United States. Ball.Seism.Sne.Anun .77, 366——383.
[4] Street,R. L——1978 .A note on the tnrizontal to vertical Lg wave amplitude ratio in eastern United Slates. F.urthqunke Notes , 49 . 1 5——20.
[5] Gupta,I.N von Seggern,D. H.and Wagner,R. A. .198? .A study of variations in the horizontal to vertical Lg amplitude ratio in the eastern United States.Buli.Seism.Sou . ,Anner 72 ,2081——2088.
[6] Toro,G. R. and Mcguire,R. K. .1987. An investigation into earthquake ground motion characteristics in eastern North America .Bull.Seism.Soo.Anur .,77、468——489.
[7] 葛焕称、倪岳伟、黄才中、李永勤.1991中国东部六省的修m1g.地震学报,13,171——178
[8] Amstadter , B. L.,1978.可靠性数学(彭兴文译)28.科学出版社,北京.
[9] Bath,M.,1979 .Teleseismic magnitude relations. Seismol.lnst.Uppsulcr Report,No.2——79,37.
[10] 陈培善、秦嘉政,1982 .量规函数、台站方位、台基及不同测量方法对近震震级M1的影响.地震学刊,1:6——15.
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