GNGTS 2023 - Atti del 41° Convegno Nazionale

Session 2.2 GNGTS 2023 distribution of the stations used and the constraints imposed by the site effects (as shown by the small scale variations). On the other hand, the reconstructions for the Genova earthquake present a noticeable difference in the maximum values: while both reconstructions are constrained to the same area, the maximum value from the INGV ShakeMap is higher than the one obtained by ShakeRec by a factor of 2.6. The cause of this difference is likely the constraint imposed by one station (RNCA) used in the INGV ShakeMap reconstruction that presents much higher values than any of the RAN ones. The ground-shaking maps for PGA reconstructed with the data available at selected times after each event (namely, , , and ) are shown in Figure 3. The coherent evolution of the 10 20 30 shaking maps over time can be interpreted as proof of the stability of the model. Figure 2. Comparison between the reconstruction from ShakeRec (i and iii) and ShakeMap (ii and iv) for the Bargagli (i and ii) and Marche (iii and iv) earthquakes. The black markers indicate the stations used for the reconstruction and the white marker the remaining stations of the network. CONCLUSIONS ShakeRec provides reliable real-time estimates of the ground motion shaking field which can be useful for Civil Protection purposes, especially in the context of post-emergency management. The