ABSTRACT
This study consists in the compilation of a "Map of the major active faults in the Holocene" (last 10 4 years)between the Po and Piave rivers and lake Como and in a Catalogue of the faults that appear on the map. Besides the various faults (numbered, classified as "active" and "supposed active" and subdivided into "outcropping" and "buried"), the Map also shows folds (anticlines and synclines), areal movements (uplifting, lowering and tilting), and epicenters of earthquakes with Richter's magnitude >=6. The Catalogue contains a description of the fault characteristics (type of fault, attitude, displacement, main historical earthquakes, period of activity, classification etc..), which are summarized on special data sheets. Overall, 32 faults have been included on the Map and in the Catalogue. Of these, 9 are "active" faults and 23 are "supposed active faults"; they are concentrated prevalently in the Veneto Pre-Alps and Belluno sector, where several folds also proved to be "active", and in the Lessini M.ts-L. Garda sector. As far as areal movement is concerned, it is possible to distinguish five areas differing in the type of movement. As regards earthquakes, only four seismic events in the study area had characteristics comparable to earthquakes with magnitudes <=6. The detailed analysis of the hypocentral depths of all the earthquakes recorded instrumentally in the study area since 1982, revealed depths of less than 30 km.(AU)
