Contemporary movement of the Earth's crust in the Northwestern Vietnam by continuous GPS data

The paper presents an estimation of the Earth's crustal motion from the continuous GPS data at 6 stations (MTEV, MLAY, DBIV, TGIV, SMAV and SLAV) in the Northwestern and at PHUT (Hanoi) station using GAMIT/GLOBK software. The absolute horizontal displacements of the Earth's crust at 7 stations in the IGS14 frame are respectively: 34.10 +/- 0.71 mm/yr (DBIV), 34.31 +/- 0.65 mm/yr (PHUT), 34.51 +/- 0.75 mm/yr (SMAV), 34.55 +/- 0.80 mm/yr (MLAY), 34.80 +/- 0.72 mm/yr (TGIV), 34.93 +/- 0.99 mm/yr (SLAV) and 35.59 +/- 0.73 mm/yr (MTEV), in the southeastward with the azimuth range 104-108 degrees. The Son La fault is a right-lateral slip fault with a shear amplitude of similar to 1.5 mm/yr. The Lai Chau - Dien Bien fault is a left-lateral slip fault with a shear amplitude of similar to 1.9 mm/yr. Although the absolute velocities at the DBIV, SMAV, SLAV, TGIV and MLAY stations are evaluated with the error < 1 mm/yr, the relative displacement on the Ma River fault is of similar to 0.5 mm/yr, and it seems that we still do not have a reliable assessment of the slip rate on the Ma River right-lateral slip fault.