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

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 i...

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Bibliographic Details
Published in:Acta seismologica sinica 2004-05, Vol.17 (3), p.282-286
Main Authors: Dai, Wang-qiang, Ren, Jun, Zhao, Xiao-mao, Shao, Hui-cheng, Zhu, Gui-zhi
Format: Article
Language:English
Subjects:
Average velocity
Basins
Blocking
Earthquakes
Geographic information systems
Global Positioning System
Global positioning systems
GPS
Marine
Movement
Satellite navigation systems
Seismic activity
Seismic engineering
Seismic phenomena
Velocity
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Summary: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 super(-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.
ISSN:1000-9116
1674-4519
1993-1344
1867-8777
DOI:10.1007/s11589-004-0050-0