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地震 ›› 2009, Vol. 29 ›› Issue (2): 1-11.

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用广义反演方法估算首都圈地区台站场地效应

史海霞1, 修济刚2, 陈章立2, 王勤彩1, 华卫1   

  1. 1.中国地震局地震预测研究所, 北京 100036;
    2.中国地震局, 北京 100036
  • 收稿日期:2008-04-11 修回日期:2008-05-05 出版日期:2009-05-31 发布日期:2021-10-18
  • 作者简介:史海霞(1980-), 女, 山东淄博人, 2005年在读硕士研究生, 主要从事台站场地效应和数字化资料应用等研究。
  • 基金资助:
    中国地震局行业基金专项(2007 8-26)资助

Site Effects Estimation for the Stations of the Capital Region, China Using Generalized Inversion Method

SHI Hai-xia1, XIU Ji-gang2, CHEN Zhang-li2, WANG Qin-cai1, HUA Wei1   

  1. 1. Institute of Earthquake Science, CEA, Beijing 100036, China;
    2. China Earthquake Administration, Beijing 100036, China
  • Received:2008-04-11 Revised:2008-05-05 Online:2009-05-31 Published:2021-10-18

摘要: 本文利用2001—2006年首都圈地区的SH波数字化地震资料, 用广义逆矩阵联合反演的方法得到了63个台站的场地效应值。 基岩场地的场地效应比较稳定, 在1~10 Hz范围内为1左右; 沉积场地在低频场地效应较高, 在1~8 Hz范围内在3~7之间, 5 Hz左右场地效应有明显的突起, 以后随频率增加降低。 结果表明, 台站岩性是影响场地效应形态和大小的主要因素, 此外其场地效应还可能与所处的局部地质构造等因素有关。

关键词: 首都圈, 场地效应, 广义逆反演法, SH波

Abstract: Generalized inversion method has been used to estimate the spatial variation of site effects, using the digital data of SH-Waves recorded by 63 stations from 2001 to 2006 in the Capital region of China. It has been found that the site effects of base rock are stable and about 1.0 in the frequency range of 1.0 Hz to 10.0 Hz; while the site effects of deposit are high in the low frequency, about 3~7 from 1.0 Hz to 8.0 Hz and the site effect was protuberant at about 5.0 Hz, then fall as the frequency increases. These results show that the shape and intensity of station site effects are mainly influenced by the lithology below the station and also influenced by local geological conformation.

Key words: Capital region, Site effect, Generalized inversion method, SH-wave

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