Geodynamic parameters derived from 7 years of laser data on Lageos

Seven years (1984 through 1990) of Laser data on Lageos have been.analysed to recover absolute stations velocities and j2. Relative motions between stations located in stable tectonic regions agree well with the NUVEL-1 model predictions within 5 mm/yr rms. Relative motion across the San Andreas Fault is found to be − 33.±1. mm/yr. Solution for the secular variation of J2 is (−2.8±0.04) × 10−11/yr.