中国东部六省的 Lg 震级(上)--测定方法和结果
Lg MAGNITUDE DETERMINATION FOR THE EASTERN SIX PROVINCES OF CHINA (PART I)--DETERMINALTION METHOD AND RESULTS
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摘要: 本文系统地分析了根据 Lg 波埃里相和非埃里相衰减系数确定单台和台网震级公式、震级标准差以及台站校正值的方法.根据中国东部苏、鲁、豫、皖、冀、浙六省地区约1秒 Lg 波衰减系数的测定结果,导出六省地区的 Lg 震级公式:mLg(z,h)=lgdLg(z,h)+5/6lg+0.0019+2.09 mmx(z,h)=lgdmx(x,h)+lg+0.0013+1.27 计算了该区域内19个地震的各震级值,以及80个台站的台校值.单台震级标准差为0.15-016震级单位,台网震级标准差为0.03-0.04震级单位.此外,还测定了111个地震的 mmxz和 mmxh值,验证或补充了19个地震得出的某些关系和结果.Abstract: The method which defines the magnitude formulas for single station and seismograph network, the standard deviation and station correction of the magnitudes is systematically explained.According to about 1 Hz Lg attenuation coefficient determined in the region including six eastern provinces of China, the Lg magnitude formulas for this region are deduced as follows: mLg(z,h)=lgdLg(z,h)+5/6lg+0.0019+2.09 mmx(z,h)=lgdmx(x,h)+lg+0.0013+1.27 MLgz,MLgh,Mmxz and Mmxh of 19 events in the region, an 80 station correction values are calculated accurately. The standard deviation of single station magnitude is 0.15-0.16 magnitude unit, and that of seismograph network is 0.03-0.04 unit.In addition, Mmxz and Mmxh of 111 events are determined. Some relations and results deduced by 19 events are verified or completed.
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[2] 中国科学院地球物理研究所,近震分析,地震出版社,271, 1977,
[3] Bath, M., O. Kalhanek, T. van Eck, and R. Wahlstrom, Engineering analysis of ground motion in Smeden,Scismol. Inst. Upsala, Rep. 5——7G, 59, 1976
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[6] Baker, R. G., Preliminary study for determining magnitude from Lg, Eartlzquake Notes, 38, 23——28, 1967.
[7] Baker, R. G., Determining magnitude from Lg, Bull. Seism. Soc. Am., 60, 1907——1919, 1970.
[8] Nuttli, O. W., Seismic wave attenuation and magnitude relations of Eastern North America, J. Geophys.Res.. 78, 876——885, 1973.
[9] Herrmann, R. B. and O. W. Nuttli, Magnitude: the relation of ML to mbLg, Berll. Seism. Soc. Am., 72,389——397, 1982.
[10] Herrmann, R. B. and A. Kijko, Shortperiod lg magnitudes: instrument, attenuation, and source effects, Bull.
[11] Seirm. Soc. Arn., 73, 1835——1850, 1983
[12] 葛焕称、黄才中、叶培元、陈静巧,江苏及其邻近地区Lg波的衰减和mLg的初步测定,地震地磁观测与研究,4,11——14,1983,
[13] 葛焕称、黄才中、叶培元、陆振飞,"综合回归分析"与中国东部六省地区Lg波衰减的测定,地晨学报,8, 367——381,1986.
[14] 陈培善、秦嘉政,量规函数、台站方位、台基及不同测量方法对近震震级ML的影响,地震学报,5,87——98,1983.
[15] 葛焕称、陈静巧、黄才中、陆振飞、叶培元,苏、鲁、豫、皖地区最大震相传播特性的初步研究,地震地磁观测与研究,4,15——17, 1983,[1] Richter, C. F., An instrumental earthquake magnitude scale, Bull. Seism. Soc. Am., 25, 1——32, 1935.
[2] 中国科学院地球物理研究所,近震分析,地震出版社,271, 1977,
[3] Bath, M., O. Kalhanek, T. van Eck, and R. Wahlstrom, Engineering analysis of ground motion in Smeden,Scismol. Inst. Upsala, Rep. 5——7G, 59, 1976
[4] White, R. E., A Local magnituW scale for South Australian earthquakes, Bull. Seasm. Soc. Azu,58,1041——1057, 1968.
[5] Hayes, R. C., Measurement of earthquake intensity, N. Z, T. Sci. and Technol., 22, 202B——204B, 1941.
[6] Baker, R. G., Preliminary study for determining magnitude from Lg, Eartlzquake Notes, 38, 23——28, 1967.
[7] Baker, R. G., Determining magnitude from Lg, Bull. Seism. Soc. Am., 60, 1907——1919, 1970.
[8] Nuttli, O. W., Seismic wave attenuation and magnitude relations of Eastern North America, J. Geophys.Res.. 78, 876——885, 1973.
[9] Herrmann, R. B. and O. W. Nuttli, Magnitude: the relation of ML to mbLg, Berll. Seism. Soc. Am., 72,389——397, 1982.
[10] Herrmann, R. B. and A. Kijko, Shortperiod lg magnitudes: instrument, attenuation, and source effects, Bull.
[11] Seirm. Soc. Arn., 73, 1835——1850, 1983
[12] 葛焕称、黄才中、叶培元、陈静巧,江苏及其邻近地区Lg波的衰减和mLg的初步测定,地震地磁观测与研究,4,11——14,1983,
[13] 葛焕称、黄才中、叶培元、陆振飞,"综合回归分析"与中国东部六省地区Lg波衰减的测定,地晨学报,8, 367——381,1986.
[14] 陈培善、秦嘉政,量规函数、台站方位、台基及不同测量方法对近震震级ML的影响,地震学报,5,87——98,1983.
[15] 葛焕称、陈静巧、黄才中、陆振飞、叶培元,苏、鲁、豫、皖地区最大震相传播特性的初步研究,地震地磁观测与研究,4,15——17, 1983,
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