Realizzazione del Geodatabase del Catalogo della SIsmicità Italiana 1981-2002 (CSI 1.0)

Abstract

The National Institute of Geophysics and Vulcanology (INGV) within the GNDT project ‘Probable earthquakes in Italy from year 2000 to 2030: guidelines for determining priorities in seismic risk mitigation’ has produced a list of Italian earthquakes concerning the recent seismic activity from 1981 to 2002. The catalogue (CSI 1.0 1981-2002) contains 99.780 identified earthquakes out of the 136.850 registered and 48.299 estimates of magnitude superior to 1.5 and is currently published on the INGV web site under the heading ‘database’, in ASCII format. For the purpose of creating a new map of the recent seismic activity but also for the making of a series of products destined to an interactive distribution on the WEB, the list has been transformed into a database managed by a GIS system. The database has been structured into a Geodatabase of ArcGIS 9 which contains the feature class for each one of the 22 listed years and the corresponding information on each seismic event. Based on a project by ArcMap in which the events have been classified based on the depth of the hypocentre and on their magnitude, software applications have been created for the distribution of the catalogue (a CD developed with the extension ArcGIS-ArcPublisher readable with the free GIS ArcReader and a WEB interface developed in ArcIMS with standard functionality) and examples of the processing dataset of quantitative analyses and geostatistical or space-temporal data processing.