Gravity and Electric Characterization of Quaternary Basin Bounded by Active Fault: Test Site Irpinia Fault Project

We present an application of the microgravimetric and electric resistivity methods to achieve a better understanding of the geometry and extension of ‘Pantano di San Gregorio Magno’ intra-montane basin, in the Southern Apennines, linked to the presence of active Irpinia fault, source of the 4th largest Italian earthquake of last century (1980, Ms=6.9). This work illustrates the acquisition surveys, the data processing and a preliminary interpretation of a near-surface complex geological structure. These information, together with new 3D seismic data, will provide a more comprehensive mapping of basin morphology and its structural features, which we hope will prove useful for a better compression of the interaction between surface faulting and basin development in this key area of the Southern Apennines.