TY - JOUR
T1 - Strong ground motion characteristics from 2016 central Italy earthquake sequence
AU - Zimmaro, Paolo
AU - Scasserra, Giuseppe
AU - Stewart, Jonathan P.
AU - Kishida, Tadahiro
AU - Tropeano, Giuseppe
AU - Castiglia, Massimina
AU - Pelekis, Panagiotis
N1 - Funding Information:
The GEER Association is supported by the National Science Foundation (NSF) through the Geotechnical Engineering Program under Grant No. CMMI-1266418.*%blankline%*
Publisher Copyright:
© 2018, Earthquake Engineering Research Institute.
PY - 2018/11/1
Y1 - 2018/11/1
N2 - The Central Italy earthquake sequence has, to date, generated three mainshocks: M6.1 24 August, M5.9 26 October, and M6.5 30 October 2016. These events, along with aftershocks, were well recorded by Italian networks, and are among the normal fault earthquakes with the highest number of recordings globally. We process records for six events using procedures developed during the latest Next Generation Attenuation (NGA-West2) project, coordinated by the Pacific Earthquake Engineering Research Center (PEER). Many recording sites lacked VS30 assignments, which we provide using measured shear wave velocity profiles where available and a local geology proxy otherwise. Stations at close distance, including near the hanging wall, exhibit fling step in some cases but no obvious rupture directivity. The data exhibit fast anelastic attenuation at large distances (>100 km), as predicted by recent Italy-adjusted global models, but not by Italy-specific models. We partition residuals from Italy-adjusted global models, finding negative event terms at short periods (weaker than average shaking). We apply Kriging of within-event peak acceleration and velocity residuals using a global semi-variogram model to estimate the spatial distribution of peak accelerations and velocities, which are generally most intense southwest of Mt. Vettore.
AB - The Central Italy earthquake sequence has, to date, generated three mainshocks: M6.1 24 August, M5.9 26 October, and M6.5 30 October 2016. These events, along with aftershocks, were well recorded by Italian networks, and are among the normal fault earthquakes with the highest number of recordings globally. We process records for six events using procedures developed during the latest Next Generation Attenuation (NGA-West2) project, coordinated by the Pacific Earthquake Engineering Research Center (PEER). Many recording sites lacked VS30 assignments, which we provide using measured shear wave velocity profiles where available and a local geology proxy otherwise. Stations at close distance, including near the hanging wall, exhibit fling step in some cases but no obvious rupture directivity. The data exhibit fast anelastic attenuation at large distances (>100 km), as predicted by recent Italy-adjusted global models, but not by Italy-specific models. We partition residuals from Italy-adjusted global models, finding negative event terms at short periods (weaker than average shaking). We apply Kriging of within-event peak acceleration and velocity residuals using a global semi-variogram model to estimate the spatial distribution of peak accelerations and velocities, which are generally most intense southwest of Mt. Vettore.
UR - https://www.scopus.com/pages/publications/85059296736
U2 - 10.1193/091817EQS184M
DO - 10.1193/091817EQS184M
M3 - Article
AN - SCOPUS:85059296736
SN - 8755-2930
VL - 34
SP - 1611
EP - 1637
JO - Earthquake Spectra
JF - Earthquake Spectra
IS - 4
ER -
