CI-FAS_GMM

CI-FAS_GMM: Tables of the non-ergodic Fourier Amplitude Spectra (FAS)-based ground motion models. The zip file contains the results of the calibration of two non-ergodic FAS ground motion models calibrated on the CI dataset. The models are obtained using, as reference rock sites, the 36 recording stations identified by Lanzano et al. (2020), or, alternatively, the 6 recording sites furtherly selected by Morasca et al. (2022). The models are regressed using a one-step mixed-effect technique, with the functional form described in Morasca et al. (2022). The predictions are valid for PGA and 69 ordinates of FAS in the frequency interval 0.5-25.06Hz.
The parametric table CI-FAS_GMM is distributed as a .zip file, containing:
  • the table of the coefficients and standard deviations in CSV format separated by ";" for the model with 36 and 6 reference sites (Coeff_36sites.csv and Coeff_6sites.csv);
  • the CSV (comma separated) tables of the systematic corrective terms of event (dBe_36sites.csv), site (dS2S_36sites.csv), source (dL2L_36sites), path (dP2P_36sites.csv) and event-, site-, source- and path-corrected residuals (dW0_36sites.csv) for the model with 36 reference sites;
  • the CSV (comma separated) tables of the systematic corrective terms of event (dBe_6sites.csv), site (dS2S_6sites.csv), source (dL2L_6sites), path (dP2P_6sites.csv) and event-, site-, source- and path-corrected residuals (dW0_6sites.csv) for the model with 6 reference sites;
  • a supporting documentation in pdf (README.pdf) describing the ground motion model and explaining the fields of the tables.
Citation
If you use the CI-FAS_GMM flat-file cite as:
Lanzano G., Colavitti L., Sgobba S., Spallarossa D., Pacor F. (2022). CI-FAS_GMM: Ground Motion Model of the Fourier Amplitude Spectrum ordinates for the shallow active crustal events in Central Italy (Version 1.0) [Data set]. Istituto Nazionale di Geofisica e Vulcanologia (INGV). https://doi.org/10.13127/CI_dataset/CI-FAS_GMM

Related papers
  • Colavitti L., Lanzano G., Sgobba S., Pacor F., Gallovič F. (2022) Empirical evidence of frequency-dependent directivity effects from small-to-moderate normal fault earthquakes in Central Italy. J. Geophys. Res. - Solid Earth https://doi.org/10.1029/2021JB023498
  • Lanzano G., Felicetta C., Pacor F., Spallarossa D., Traversa P. (2020) Methodology to identify the reference rock sites in regions of medium-to-high seismicity: an application in Central Italy Geophysical Journal International, 222(3), 20532067 https://doi.org/10.1093/gji/ggaa261
  • Morasca P., D’Amico M., Sgobba S., Lanzano G., Colavitti L., Pacor F., Spallarossa D. (2022) Empirical correlations between a FAS non-ergodic ground motion model and a GIT derived model for Central Italy (2022) Geophysical Journal International https://doi.org/10.1093/gji/ggac445
  • Sgobba S., Lanzano G., Pacor F. (2021) Empirical non-ergodic shaking scenarios based on spatial correlation models: an application to central Italy. Earthquake Engineering and Structural Dynamics. 50: 60-80 https://doi.org/10.1002/eqe.3362