Journal of Earth Science

, Volume 22, Issue 1, pp 117–123 | Cite as

Rayleigh wave group velocity distribution in Ningxia

  • Hongyi Li (李红谊)
  • Xin Liu (刘昕)
  • Xinfu Li (李信富)
  • Juqin Sheng (盛菊琴)
  • Xinhua Cai (蔡新华)
  • Tongli Wang (王同利)
Article

Abstract

In this article, seven months ambient noise data and 10 events recorded at seven digital stations from the Ningxia (宁夏) regional seismic network and 5 500-t controlled source explosion data recorded by 15 temporary and 7 permanent seismic stations are used to measure dispersion curves of fundamental mode Rayleigh waves. The study region was divided into grids with 0.1°×0.1°; group velocity distributions of Rayleigh waves from 6–22 s were determined with the Occam’s inversion technique. These velocity distribution maps show the lateral velocity variations in the study area, and the velocity structures are correlated with surface geology and tectonic units. The Yinchuan (银川) basin is clearly featured with low velocities, and the Helan (贺兰) Mountain and southern mountain areas are revealed with high velocities.

Key Words

Rayleigh wave group velocity ambient noise explosion 

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Copyright information

© China University of Geosciences and Springer-Verlag Berlin Heidelberg 2011

Authors and Affiliations

  • Hongyi Li (李红谊)
    • 1
    • 2
  • Xin Liu (刘昕)
    • 2
  • Xinfu Li (李信富)
    • 2
  • Juqin Sheng (盛菊琴)
    • 3
  • Xinhua Cai (蔡新华)
    • 3
  • Tongli Wang (王同利)
    • 4
  1. 1.Key Laboratory of Geo-detection (China University of Geosciences, Beijing)Ministry of EducationBeijingChina
  2. 2.School of Geophysics and Information TechnologyChina University of GeosciencesBeijingChina
  3. 3.Earthquake Administration of Ningxia Hui Autonomous RegionYinchuanChina
  4. 4.Earthquake Administration of Beijing MunicipalityBeijingChina

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