ITACAext flatfiles: parametric tables of metadata and strong motion intensity measures

The ITACAext flat-files are parametric tables containing metadata and intensity measures of manually processed waveforms, relevant for the analysis of the ground-motion in Italy.
The flat-file is constituted by the data included in ITACA up to 2022 December 31st. Moreover, it is integrated with velocimetry records of small magnitude events in the less sampled areas in Italy (e.g., Liguria, Piedmont, and western Sicily), taking care to exclude recordings affected by instrument saturation. If the earthquakes are recorded at the Italian boundaries, the records of the networks of the neighbouring countries, such as France, Switzerland, Slovenia, Albania, and Montenegro, are also added in order to improve the spatial and azimuthal sampling of the events. All the waveforms of this extended dataset (called ITACAext) were manually processed according to the standard ITACA scheme, described in Paolucci et al. (2011) and Puglia et al. (2018). The flat-file of the ITACAext records is formatted consistently with the Engineering Strong Motion database flat-file (Lanzano et al. 2019). ITACAext will be the primary source of information to study the local differences of ground-motion in Italy and develop the new-generation regionalized ground-motion models for events in active crustal regions, volcanic and subduction zones. The event selection criteria are: i) time interval 1972-2022; ii) revised events (events with preliminary locations are excluded); iii) latitude range [35°-48°] and longitude range [6°-19°]; iv) magnitude (moment Mw, local ML or surface waves Ms) higher or equal to 3.0.