GEODETIC INVESTIGATION OF THE 13 MAY 1995 KOZANI-GREVENA (GREECE) EARTHQUAKE

The M(s) = 6.6 13 May 1995 Kozani - Grevena earthquake struck a region of low historical seismic activity which includes a 10-year-old trian gulation network in northern Greece. After the earthquake, monuments f rom this network were occupied with GPS to measure co-seismic displace ments. Inversion of the co-seismic displacement field to yield a sourc e mechanism is achieved by use of a hybrid simplex - Monte-Carlo metho d which requires no a priori constraints. The model focal mechanism ag rees well with the global CMT solution and locally observed aftershock s, but implies a significantly higher scalar moment than do seismologi cal or SAR interferometry studies, and has a longer fault length than the model based on SAR interferometry.