The new release of the Database of Individual Seismogenic Sources, DISS 3.1.1.

Abstract

The Database of Individual Seismogenic Sources (DISS) was conceived at the end of the 1990s by a group of scientists at Istituto Nazionale di Geofisica e Vulcanologia. The database was designed to host data about seismogenic source models intended to serve as geological input for ground-shaking SHA applications and was continuously updated since then (BASILI et alii, 2008).

In 2005 there was a big turn in this process as we launched a new version of the database (DISS 3) which augmented the database with two innovative categories: the Composite Seismogenic Sources and the Debated Seismogenic Sources - alongside of the native Individual Seismogenic Sources.

_________________________ (*) Istituto Nazionale di Geofisica e Vulcanologia, Rome. paola.vannoli@ingv.it

At this time we also made the database available online through a dedicated web-dased GIS application. Its IT infrastructure was also kept up to date and guidelines on how to prepare new records have been distributed to potential contributors (BASILI et alii, 2009). During the years, DISS brought together a large amount of published and original data on Italian seismogenic sources having a potential for a magnitude 5.5+ earthquake and is now being extended to the rest of the Euro-Mediterranean area. We present highlights on the identification and characterization of new seismogenic sources in four key-areas in Italy, namely Lombardia-Emilia-Veneto (Southern Alps, Northern Apennines), Adriatic Sea, Ionian Sea, and Abruzzo/Molise (central Apennines). These new sources describe youthful structures of the Alpine south-verging Apennine north-verging contractional systems, the external fold-and-thrust system in the Adriatic and Ionian offshore, and the extensional domain of the inner central Apennines. For each of these areas we illustrate a combination of original data collected and interpreted by our group together with reviews of published literature. We will also outline contributions from several other scientists that collaborated with us during the two-year term of “Project S1” funded by the Dipartimento Protezione Civile (Agreement 2007-2009). The main novelties include updates of the geometric and kinematic properties of seismogenic sources, new geological data and numerical constraints on deformation rates, new interpretations of faults that are thought to have generated a number of historical earthquakes.