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Acta Seismologica Sinica

, Volume 17, Issue 3, pp 282–286 | Cite as

Characteristics of horizontal crustal movement in Weihe basin and adjacent zones by GPS observation

  • Dai Wang-qiang 
  • Ren Jun 
  • Zhao Xiao-mao 
  • Shao Hui-cheng 
  • Zhu Gui-zhi 
Article

Abstract

Based on the GPS data provided by CMONOC during 1999–2002 and observed by Seismological Bureau of Shaanxi Province during 2001–2002, we have obtained the crustal movement velocity field in Weihe basin and adjacent regions. The results show that the motion velocity in Weihe basin and adjacent zones is characterized by distinct NE-directional stripped variation. The south border of Ordos block seems to show an discontinuous anti-clockwise rotation on the whole with an average velocity of about 5.7 mm·a−1 relative to Yulin site on the Ordos block. There is a left-lateral shear belt on both sides of Binxian-Xi’an-Lantian zone in the central Weihe basin, and its northern area has a better corresponding relationship with the dense zone of small earthquakes in Tong-chuan-Jingyang-Lintong-Weinan.

Key words

south border of Ordos block Weihe basin crustal movement GPS observation 

CLC number

P313.4 

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Copyright information

© Acta Seismologica Sinica 2004

Authors and Affiliations

  • Dai Wang-qiang 
    • 1
    • 2
  • Ren Jun 
    • 2
  • Zhao Xiao-mao 
    • 2
  • Shao Hui-cheng 
    • 2
  • Zhu Gui-zhi 
    • 3
  1. 1.Seismological Institute of LanzhouLanzhouChina
  2. 2.Earthquake Administration of Shaanxi ProvinceXi’anChina
  3. 3.Second Center For Crustal Deformation MonitoringChina Earthquake AdministrationXi’anChina

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