Analysis of Present-Day Crustal Deformation in Hubei by GPS Observation
Abstract In this study, we calculate GPS observation data from 76 continuous sites between May 2011 and June 2013 of the CMONOC and HBCORS networks. We get the precise coordinates, the time series, and the horizontal movement velocity field of each station. The results show that the movement speed is about 6-9 mm/a, and gives priority to movement to the east or southeast direction, which is almost the same as the movement characteristics of the south China block. The preliminary results show that there is no obvious difference in the Hubei region. Also, we calculate the principal strain rate and the maximum shear strain rate. The results show that the maximum shear strain rate sensitive area is mainly the area where the faults distribute centrally; the maximum value mainly distributes in Badong, Zigui and Zhushan-Yunxian and its neighbor area; the value is about (1.43-1.73)×10-7/a, ,the results correspond obviously to Zigui M4.5 and M4.7 earthquakes, and Fangxian M4.0 earthquake in Hubei region in 2014.
Key words :
GPS velocityfield
time series
principle strain rate
maximum shear strain rate
Cite this article:
NIE Zhaosheng,XIONG Wei,HUANG Yong. Analysis of Present-Day Crustal Deformation in Hubei by GPS Observation[J]. jgg, 2016, 36(10): 922-926.
NIE Zhaosheng,XIONG Wei,HUANG Yong. Analysis of Present-Day Crustal Deformation in Hubei by GPS Observation[J]. jgg, 2016, 36(10): 922-926.
URL:
http://www.jgg09.com/EN/ OR http://www.jgg09.com/EN/Y2016/V36/I10/922
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