Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/15464
Authors: Ojeda, Javier* 
Akinci, Aybige* 
Tinti, Elisa* 
Arriola, Sebastian* 
Ruiz, Sergio* 
Title: Hybrid broadband strong-motion simulation to investigate the near-source characteristics of the M6.5, 30 October 2016 Norcia, Italy earthquake
Journal: Soil Dynamics and Earthquake Engineering 
Series/Report no.: /149 (2021)
Publisher: Elsevier
Issue Date: 13-Jun-2021
DOI: 10.1016/j.soildyn.2021.106866
Keywords: Ground-motion simulation
Hybrid Method
30 October 2016 Norcia earthquake
Site effects
Subject Classification04.06. Seismology 
Abstract: During the 2016–2017 Central Italy earthquake sequence, a series of moderate to large earthquakes M > 5 occurred near the Amatrice and Norcia towns. These events are recorded on a dense seismic network, providing relevant observational evidence of complex earthquakes in time and space. In this work, we used this substantial data set to study the ground-motion characteristics of the Norcia earthquake M6.5 on October 30, 2016, through a broadband ground-motion simulation. Three-component broadband seismograms are generated to cover the entire frequency band of engineering interest. Low and high frequencies are computed considering the heterogeneous slip rupture model of Scognamiglio et al. (2018) [1]. High frequencies are calculated using a stochastic approach including P, SV, and SH waves, while low frequencies are obtained through a forward simulation of the kinematic model at the various stations. To predict earthquake-induced ground motions in the area, we adopted region-specific attenuation and source scaling parameters derived by Malagnini et al. (2011) [2]. Ground-motion parameters, including peak ground acceleration (PGA), peak ground velocity (PGV) and spectral amplitudes, are calculated at the selected sites adopting physics-based parameters to understand better the earthquake fault rupture, the wave propagation, and their impacts on the seismic hazard assessment in the region. We showed that combining the fault rupture history over the entire frequency spectrum of engineering interest, the attenuation characteristics of the seismic wave propagation, and the properly defined site responses can improve the prediction of ground motions and time histories, especially in near seismic sources.
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