Abstract：We collected and combined all mobile GPS data between 1999 and 2009 around ZhangjiakouBohai seismic belt, and obtained the velocities at 143 stations. At the same time,we constructed a regional strain field of the ZhangjiakouBohai seismic belt region with leastsquare collocation, and investigated the slip rate of ZhangjiakouBohai belt. The study results show that: 1) the regional maximum displacement is about 5 mm/a,2) ZhangjiakouBohai seismic belt is creeping in with leftlateral slip rate of 2.0 mm/a and the creeping depth is in a range of 25-45 km,3) The maximum shear strain is 3×10 -8 /a in BeijingTianjin and Tangshan area.
Jin Honglin ,Hu Xinkang ,and Wang Yuebing . STUDY ON STRAIN FIELD AROUND ZHANGJIAKOU-BOHAI SEISMIC BELT WITH LEAST-SQUARE COLLOCATION[J]. jgg, 2012, 32(2): 7-10.
