中国东部六省的 Lg 震级(上)——测定方法和结果

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. 

Lg MAGNITUDE DETERMINATION FOR THE EASTERN SIX PROVINCES OF CHINA (PART I)--DETERMINALTION METHOD AND RESULTS

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.