欢迎访问《地震》，
地震

地震 ›› 2010, Vol. 30 ›› Issue (1): 125-130.

• • 上一篇    下一篇

甘肃地区S波非弹性衰减Q值研究

陈继锋1, 赵翠萍2, 杨立明1   

  1. 1.中国地震局兰州地震研究所, 甘肃 兰州 730000;
    2.中国地震局地震预测研究所, 北京 100036
  • 收稿日期:2009-03-11 修回日期:2009-06-05 出版日期:2010-01-31 发布日期:2021-10-15
  • 作者简介:陈继锋(1978-), 男, 甘肃清水人, 2009年获硕士学位, 主要从事地震监测和地震学等研究。
  • 基金资助:
    中国地震局行业专项(200708026)和中国地震局兰州地震研究所青年基金(2009265)资助

Q Values of S Wave InelasticAttenuation in Gansu Region

CHEN Ji-feng1, ZHAO Cui-iping2, YANG Li-ming1   

  1. 1. Lanzhou Institute of Seismology, CEA, Lanzhou 730000, China;
    2. Institute of earthquake science, CSB, Beijing 100036, China
  • Received:2009-03-11 Revised:2009-06-05 Online:2010-01-31 Published:2021-10-15

PDF (PC)

摘要： 文中利用新建“十五”数字化地震观测网络项目记录到的甘肃地区地震波形资料, 研究了甘肃地区S波的非弹性衰减Q值, 得到甘肃东南地区Q值与频率的关系为Q(f)=374.0f0.3084; 祁连山中东段地区Q值与频率的关系为Q(f)=693.6f0.2865。 从分区Q值研究结果看, 各分区之间存在较大差异, 显示出了Q值空间分布的非均匀性特征, 这种区域差异性与甘肃地区构造活动、 地震活动、 地壳速度结构及热活动状态的区域差异性有较好的一致性, 活动强烈、 高热活动以及低速区为相对低Q值区, 地震波衰减较快。

关键词: 甘肃地区, 联合反演, 非弹性衰减Q值 , SH波

Abstract: By using of wave data from the Lanzhou digital seismic network, quality factor Q values of S wave inelastic attenuation had been studied in Gansu region. It has been obtained that the frequency-dependent inelastic attenuation Q value is Q(f)=374.00.3084 in the southeastern Gansu, and Q(f)=693.6f0.2865 in the middle-east segment of the Qilianshan. The results show that there exists great difference in the subarea Q values, presenting the heterogeneity of Q value space distribution. The Q value is lower in southeastern Gansu area, and higher in the middle-east segment of the Qilianshan. These spatial differences of Q value distribution is in accordance with the regional difference of tectonic activity, seismicity and geothermal structures in Gansu region. The zones with intensively tectonic activities and higher geothermal activities belong to low Q value zones, where seismic waves attenuate more rapidly.

Key words: Gansu region, Simultaneous inversion, Inelastic attenuation, Q value, SH-wave

中图分类号: