The ASI dataset is a table containing the Acceleration Spectrum Intensity (ASI) computed for 1,222 million grid points in Italy. For each node of the grid, the 5%-damped elastic acceleration response spectrum was computed using the ESM REXEL-target-spectrum Web-Service (https://esm-db.eu/esmws/rexel-target-spectrum/1/) and according to the Italian Building Code, also considering the corresponding subsoil category and topographic class. The ASI parameter was evaluated as its integral average and was estimated over three overlapping period ranges (0.1-0.5s, 0.4-0.8s, 0.7-1.1s). The continuous ASI values were, subsequently, classified into five seismic hazard classes. 2026-07 Portale dei dati aperti Open Data Portal]]> https://data.ingv.it 20-07-2026 10.13127/asi123 1.0 terremoti http://www.opendefinition.org/licenses/cc-by Istituto Nazionale di Geofisica e Vulcanologia (INGV) Istituto Nazionale di Geofisica e Vulcanologia (INGV) customer service https://data.ingv.it 2026-07-20T00:00:00 https://data.ingv.it/dataset/1222 ITA 2026-07-01T00:00:00 {"type": "MultiPolygon","coordinates": [[[ [6.6266,47.0933], [18.5218,47.0933], [18.5218,35.4943], [6.6266,35.4943], [6.6266,47.0933] ]]]} https://data.ingv.it/person/scienza scienza Acceleration Spectrum Intensity (ASI) values for Italy in three structural period ranges (0.1-0.5s, 0.4-0.8s, 0.7-1.1s)