广东地区求解环境剪应力场不同方法的常数值的确定
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摘要
陈培善等推导了多个求解环境剪应力场0τ的公式,利用广东数字地震台网记录到的广东及邻近地区1999年以来163个ML2.0~5.2地震求解不同公式中的常数,假设广东地区环境剪应力场为5 M Pa,求得C3=-5.707,C4=4.678,C5=-0.259、C6=-5.91、C7=-12.01,C3~C7依次代表利用地震波辐射能量、拐角频率、震源峰值加速度、震源峰值速度或震源峰值位移求解0τ时所用到的常数。与其它地区的计算结果比较,显示不同地区的C4~C7较为接近,而C3相差较大。
Based on some formulae for estimating ambient shear stress τ_0 which are deduced by Chen Pei-shan et al,we have studied the constants of formulae by using 161 earthquakes(M_L2.5-5.2) occurring in Guangdong and its adjacent area recorded by Guangdong Digital Telemetry Seismogragh Network.Supposing that the level of ambient shear stress field of Guangdong area is 5 MPa,we get: C_3=-5.707,C_4=4.678,C_5=-0.259?C_6=-5.91?C_7=-12.01.where C_3,C_4,C_5,C_6,C_7 represent the constants of some formula estimating ambient shear stress respectively by the seismic radiated energy E,the corner frequency f_c,the peak acceleration a_p,the peak velocity v_p,and the peak displacement d_p.Comparisons are made of the constants for different areas,and it is found that the constants C_4～C_7 are roughly identical respectively for different areas,but the constant C_3 differ significantly.
Based on some formulae for estimating ambient shear stress τ_0 which are deduced by Chen Pei-shan et al,we have studied the constants of formulae by using 161 earthquakes(M_L2.5-5.2) occurring in Guangdong and its adjacent area recorded by Guangdong Digital Telemetry Seismogragh Network.Supposing that the level of ambient shear stress field of Guangdong area is 5 MPa,we get: C_3=-5.707,C_4=4.678,C_5=-0.259?C_6=-5.91?C_7=-12.01.where C_3,C_4,C_5,C_6,C_7 represent the constants of some formula estimating ambient shear stress respectively by the seismic radiated energy E,the corner frequency f_c,the peak acceleration a_p,the peak velocity v_p,and the peak displacement d_p.Comparisons are made of the constants for different areas,and it is found that the constants C_4～C_7 are roughly identical respectively for different areas,but the constant C_3 differ significantly.
引文
[1]陈培善,谷继成,李文香.从断裂学观点研究地震的破裂过程和地震预报[J].地球物理学报,1977,20(3):185-202
[2]陈培善,陈海通.由二维破裂模式导出的地震定标律[J].地震学报,1989,11(4):337-350
[3]Chen Pe ishan,Chen H a itong.Sca ling law and its ap-p lication to earthquake statistica l re lations[J].T ectonophys ics,1989,(166):53-72
[4]陈培善,白彤霞.震源参数之间的定量关系[J].地震学报,1991,13(4):401-411
[5]陈培善,S.J.Duda.峰值速度和加速度对环境剪应力的依赖性[J].地球物理学报,1993,36(2):185-194
[6]叶秀薇,闻则刚,杨马陵,等.广东地区4级左右地震前环境剪应力场的变化[J].地震地磁观测与研究,2003,24(6):26-31
[7]闻则刚,胡秀敏,何琳,等.应用数字地震台网资料求解广东地区的环境剪应力场[J].华南地震,2000,20(4):54-59
[8]Zoback M,T sukahara H,H iclm an S.S tress m easure-m en t at dept in the v ic in ity of the san andeas fau lt:Im p lication for the m agn itude of shear stress at depth[J].J.G eophys.R es.,1980,85(B 11):6157-6173
[9]B rune J N.T ecton ic stress and the spectra of se ism icw aves from earthquake[J].J G eophys R es,1970,(75):4997-5009
[10]康英,郑斯华,刘杰,等.中小地震震源参数的求解及其相似关系[J].华南地震,2004,24(2):11-21
[11]闻则刚.ART算法的改进及其实际应用——面波Q值反演[J].华南地震,1998,18(2):37-41
[12]杨仕升,李柳英,莫敬业,等.广西及邻区环境剪应力场基本特征与未来地震危险区预测研究[J].地震,2004,24(2):81-88
[13]Chen Pe ishan,S.J.Suda.V ariation of am b ien t shearin earthquake sequence[M].Se lected papers of thesecond in ternationa l con ference on con tinen ta l earth-quakes.IA SPE I pub lication series for the IDNDR vo l-um e N o.3.B e jing:Se ism o log ica l P ress,1993
[14]白彤霞,陈培善.利用北京数字化台网资料估计首都圈地区的构造环境剪应力场[J].华南地震,1998,18(1):9-14
[2]陈培善,陈海通.由二维破裂模式导出的地震定标律[J].地震学报,1989,11(4):337-350
[3]Chen Pe ishan,Chen H a itong.Sca ling law and its ap-p lication to earthquake statistica l re lations[J].T ectonophys ics,1989,(166):53-72
[4]陈培善,白彤霞.震源参数之间的定量关系[J].地震学报,1991,13(4):401-411
[5]陈培善,S.J.Duda.峰值速度和加速度对环境剪应力的依赖性[J].地球物理学报,1993,36(2):185-194
[6]叶秀薇,闻则刚,杨马陵,等.广东地区4级左右地震前环境剪应力场的变化[J].地震地磁观测与研究,2003,24(6):26-31
[7]闻则刚,胡秀敏,何琳,等.应用数字地震台网资料求解广东地区的环境剪应力场[J].华南地震,2000,20(4):54-59
[8]Zoback M,T sukahara H,H iclm an S.S tress m easure-m en t at dept in the v ic in ity of the san andeas fau lt:Im p lication for the m agn itude of shear stress at depth[J].J.G eophys.R es.,1980,85(B 11):6157-6173
[9]B rune J N.T ecton ic stress and the spectra of se ism icw aves from earthquake[J].J G eophys R es,1970,(75):4997-5009
[10]康英,郑斯华,刘杰,等.中小地震震源参数的求解及其相似关系[J].华南地震,2004,24(2):11-21
[11]闻则刚.ART算法的改进及其实际应用——面波Q值反演[J].华南地震,1998,18(2):37-41
[12]杨仕升,李柳英,莫敬业,等.广西及邻区环境剪应力场基本特征与未来地震危险区预测研究[J].地震,2004,24(2):81-88
[13]Chen Pe ishan,S.J.Suda.V ariation of am b ien t shearin earthquake sequence[M].Se lected papers of thesecond in ternationa l con ference on con tinen ta l earth-quakes.IA SPE I pub lication series for the IDNDR vo l-um e N o.3.B e jing:Se ism o log ica l P ress,1993
[14]白彤霞,陈培善.利用北京数字化台网资料估计首都圈地区的构造环境剪应力场[J].华南地震,1998,18(1):9-14
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