The inventory, completed between 1991 and 1992, and the update, carried out in 1995 and 1996, produced a large archive of historical information on mass-movements and floods in Italy for the period 1918-1994. Information is stored into a variety of paper forms (S0, S1, S2 and S3) available at the CNR-IRPI in Perugia.

To complete the inventory more than 400,000 newspaper issues were screened, together with more than 1000 books, reports and technical and scientific papers. The majority of the information collected comes from newspapers. During the inventory more than 150 experts in the field of geological and hydrological hazard were interviewed.

Most of the information was digitised and stored into a computer database. The database currently contains more than 25,000 records, subdivided into more than 45 relational tables. The digital archive can be accessed directly at the GNDCI information system sites at A version of the database for the distribution to the public is also available.

The AVI archive represents the largest source of information on mass-movements and inundation ever prepared for Italy and one of the few in the world.