Publication Date:
2022-06-22
Description:
In this paper we simulate the earthquake that hit the city of L'Aquila on the 6th of
April 2009 using SPEED (SPectral Elements in Elastodynamics with Discontinuous
Galerkin), an open-source code able to simulate the propagation of seismic waves in
complex three-dimensional (3D) domains. Our model includes an accurate 3D recon-
struction of the Quaternary deposits, according to the most up-to-date data obtained
from the Microzonation studies in Central Italy and a detailed model of the topography
incorporated using a newly developed tool (May et al. 2021).
The sensitivity of our results with respect to dfferent kinematic seismic sources is inves-
tigated. The results obtained are in good agreement with the recordings at the available
seismic stations at epicentral distances within a range of 20km. Finally, a blind source
prediction scenario application shows a reasonably good agreement between simulations
and recordings can be obtained by simulating stochastic rupture realizations with basic
input data. These results, although limited to nine simulated scenarios, demonstrate
that it is possible to obtain a satisfactory reconstruction of a ground shaking scenario
employing a stochastic source constrained on a limited amount of ex-ante information.
A similar approach can be used to model future and past earthquakes for which little
or no information is typically available, with potential relevant implications for seismic
risk assessment.
Description:
Published
Description:
29–49
Description:
3T. Fisica dei terremoti e Sorgente Sismica
Description:
JCR Journal
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
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