Abstract Coseismic tilt and strain offsets for Wenchuan Ms8.0 earthquake had been recorded by almost all of the continuous tilt and strain instruments in China. These offsets can be interpreted as qui-static tectonic changes after the earthquake. We calculate coseismic tit and strain offsets at the stations around about 450 km of the epicenter and coseismic tilt and strain offsets are simulated with halfspace elastic dislocation model, particalarly using finite slip models inversed from farfield broadband seismic waveforms and from nearfield geodetic data (GPS&InSAR). Consequently, comparisons between the observed and modeled offsets for tilt and strainmeters are analyzed. Our preliminary study demonstrates that the directions of observed ~75% tilt offset and ~33.3% strain offset are consistent with that modeled, respectively, and the magnitude of the observed tilt offsets are 1-2 orders larger than that of modeled, whereas the observed strain offsets are coherent with the modeled or 1 orders of magnitude larger than that of modeled.
