Geodetic investigation of the 13 May 1995 Kozani‐Grevena (Greece) Earthquake

Abstract

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 triangulation network in northern Greece. After the earthquake, monuments from this network were occupied with GPS to measure co‐seismic displacements. Inversion of the co‐seismic displacement field to yield a source mechanism is achieved by use of a hybrid simplex‐Monte‐Carlo method which requires no a priori constraints. The model focal mechanism agrees well with the global CMT solution and locally observed aftershocks, but implies a significantly higher scalar moment than do seismological or SAR interferometry studies, and has a longer fault length than the model based on SAR interferometry.