中南五省地区Lg波衰减及震级公式  

LG WAVE ATTENUATION AND MAGNITUDE FORMULAS FOR THE FIVE SOUTHERN PROVINCES OF CHINA

作　　者：姚宏 李永勤[2] 徐元耀 鲁忠良[2] 黄才中[2] 

机构地区：[1]广西地震办公室 [2]江苏省地震局

出　　处：《华南地震》1989年第4期1-9,共9页South China Journal of Seismology

基　　金：地震学联合科学基金会部分资助的课题

摘　　要：选取桂、粤、湘,赣、闽五省及其附近地区16个地震31个台站的DD—1短周期地震仪记录资料。用综合回归分析法测定了Lg波传播速度为3.54Kmls,约1秒Lg波埃里相滞弹性衰减系数为r=0.0022±0.0001Km^(-1),并导出五省地区的Lg震级公式: m_(Lg)=LgA_(mxh)+q_s(△)+D_(mh) q_s(△)=5/6Lg△+0.00096△+1.88 计算了该区域内16个地震的各震级值,以及31个台站的台校值。单台震级标准差为0.13～0.15震级单位,台网震级标准差为0.02～0.03震级单位。In this paper, the data of 16 earthquakes recorded by DD-1 short period seismograph at 31 seismologic stations in and near the five southern provinces of China are used. The Lg wave propogation velocity was determined to be 3.54 km/s by the synthetic regression method.The anelastic attenuation coefficient is found to be 0.0022±0.0001 km-1 for 0.7s Lg Airy phase and the Lg magnitude formulas for this region are deduced as follows: mLg=Lg Amxh + qs(△)+Dmh where, qs(△) =5/6Lg△+0.00096△ +1.88 The mLg-values of 16 events and 31 stations correction values are calculated accurately in the region. The standard deviation of single station magnitude is 0.13-0.15 magnitude unit, and that of seismograph networh is 0 02-0.03 unit.

关 键 词：LG波 震级 地震波 

分 类 号：P315.3[天文地球—地震学]