计算地震初至波视出射角方法
|
摘要
在理论上证明了使用地震初至波位移、速度或加速度记录资料在时间域或频率域计算视出射角,使视出射角计算不受位移记录及时间域限制。在干扰信号频率段与有效信号频率段存在差异时分别在时间域和频率域进行了视出射角计算,结果表明在频率域中得到的视出射角基本与理论值相符,与方位角无关;而在时间域中获得的视出射角与理论值波动很大。应用实际地震波记录资料计算了不同台站的视出射角,其结果同样表明在频率域中获得的视出射角比时间域视出射角更加稳定和可信。
In time domain or frequency domain,using displacement,velocity or acceleration of seismic first-arrival wave,the apparent emergence angles are separately calculated.In theory it is proved that calculating apparent emergence angle is not limited by displacement records and time domain.Considering the difference between frequency ranges of interference signal and effective signal,respectively in time domain and frequency domain the apparent emergence angles are calculated,the result shows that the apparent emergence angle in frequency domain basically is equal to the theoretical value,has nothing to do with the azimuth,but the angle has big fluctuation with theoretical value in time domain.It indicates that the apparent emergence angle is less affected by interference signal in frequency domain.Appling the method and using real seismic wave records,the apparent emergence angles of seismic first-arrival wave in some stations are calculated,the results indicate that the apparent emergence angle is more stable and credible in frequency domain than in time domain.
In time domain or frequency domain,using displacement,velocity or acceleration of seismic first-arrival wave,the apparent emergence angles are separately calculated.In theory it is proved that calculating apparent emergence angle is not limited by displacement records and time domain.Considering the difference between frequency ranges of interference signal and effective signal,respectively in time domain and frequency domain the apparent emergence angles are calculated,the result shows that the apparent emergence angle in frequency domain basically is equal to the theoretical value,has nothing to do with the azimuth,but the angle has big fluctuation with theoretical value in time domain.It indicates that the apparent emergence angle is less affected by interference signal in frequency domain.Appling the method and using real seismic wave records,the apparent emergence angles of seismic first-arrival wave in some stations are calculated,the results indicate that the apparent emergence angle is more stable and credible in frequency domain than in time domain.
引文
[1]李稳,张元生.地震波到时与视出射角联合定位方法研究[J].西北地震学报,2009,31(3):34-39.
[2]李稳.地震波到时与视出射角联合定位方法研究[D].兰州:中国地震局兰州地震研究所,2008.
[3]韩庆丑.地震波真出射角及震源深度表[J].地震,1981,(5):22-23.
[4]朱海林.用视出射角法求震源深度的一种近似修正法[J].地震学刊,1985,(3):33-38.
[5]傅淑芳,刘宝诚.地震学教程[M].北京:地震出版社,1991:83-85.
[6]李清河,张元生,涂毅敏.祁连山-河西走廊地壳速度结构及速度与电性的联合解释[J].地球物理学报,1998,41(2):197-209.
[7]莘海亮,张元生,郭晓,等.2004年6月甘肃临泽震群地震精确定位[J].西北地震学报,2008,30(1):71-74.
[8]郭晓,张元生,莘海亮,等.祁连山中东段地区非弹性衰减系数、震源参数和场地响应研究[J].西北地震学报,2007,29(4):319-325.
[9]张元生,李清河,徐果明.联合利用走时与波形反演技术研究地壳三维速度结构(Ⅰ)——理论与方法[J].西北地震学报,1998,20(2):8-15.
[10]张元生,李清河,徐果明.联合利用走时与波形反演技术研究地壳三维速度结构(Ⅱ)——应用[J].西北地震学报,1998,20(3):8-15.
[11]ZHANG Yuan-sheng,ZHOU Min-du,RONG Dai-lu,et al..3-D velocity structure in the central-eastern part of Qilians-han[J].ACTA SEISMOLOGICA SI NCA,2004,17(3):272-281.
[12]陈运泰,吴忠良,王培德,等.数字地震学[M].北京:地震出版社,2000:55-65.
[13]陈玉东.数字信号处理[M].北京:地质出版社,2005:146-148.
[2]李稳.地震波到时与视出射角联合定位方法研究[D].兰州:中国地震局兰州地震研究所,2008.
[3]韩庆丑.地震波真出射角及震源深度表[J].地震,1981,(5):22-23.
[4]朱海林.用视出射角法求震源深度的一种近似修正法[J].地震学刊,1985,(3):33-38.
[5]傅淑芳,刘宝诚.地震学教程[M].北京:地震出版社,1991:83-85.
[6]李清河,张元生,涂毅敏.祁连山-河西走廊地壳速度结构及速度与电性的联合解释[J].地球物理学报,1998,41(2):197-209.
[7]莘海亮,张元生,郭晓,等.2004年6月甘肃临泽震群地震精确定位[J].西北地震学报,2008,30(1):71-74.
[8]郭晓,张元生,莘海亮,等.祁连山中东段地区非弹性衰减系数、震源参数和场地响应研究[J].西北地震学报,2007,29(4):319-325.
[9]张元生,李清河,徐果明.联合利用走时与波形反演技术研究地壳三维速度结构(Ⅰ)——理论与方法[J].西北地震学报,1998,20(2):8-15.
[10]张元生,李清河,徐果明.联合利用走时与波形反演技术研究地壳三维速度结构(Ⅱ)——应用[J].西北地震学报,1998,20(3):8-15.
[11]ZHANG Yuan-sheng,ZHOU Min-du,RONG Dai-lu,et al..3-D velocity structure in the central-eastern part of Qilians-han[J].ACTA SEISMOLOGICA SI NCA,2004,17(3):272-281.
[12]陈运泰,吴忠良,王培德,等.数字地震学[M].北京:地震出版社,2000:55-65.
[13]陈玉东.数字信号处理[M].北京:地质出版社,2005:146-148.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心