INTERIM-REPORT ON A REGIONAL RCM-NETWORK IN FRIULI, ITALY

The paper gives a report on geodetic activities in the epicentral region of the North Italian earthquake of May 1976 situated in the town of Gemona. The Gemona network was installed in 1989 as a regional monitoring network with seven points and an extension of 10 × 10 km. It is shown how this regional network is connected with other local networks in the Friuli region and how it is integrated into the GPS-Alps-traverse. The paper outlines the method for combining GPS and terrestrial data types in a 3-D concept, as well as for transforming and mapping GPS-results for a respective combination with terrestrial data in a classical (2-D, 1-D) concept. The accuracies which could be realized by combining GPS and terrestrial data and some respective sensitivity studies are described, also stressing the comparison of GPS against classical terrestrial data types. Finally the paper presents the deformation analysis results, which have been evaluated with the hitherto available data.