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The 1-D and 2-D seismic modeling of deep Quaternary basin (downtown L'Aquila, central Italy)

Luca Macerola, Marco Tallini, Giuseppe Di Giulio, Marco Nocentini and Giuliano Milana
The 1-D and 2-D seismic modeling of deep Quaternary basin (downtown L'Aquila, central Italy)
Earthquake Spectra (November 2019) 35 (4): 1689-1710

Abstract

We compare the results of one-dimensional (1-D) and two-dimensional (2-D) modeling of the up-to-date geological section of downtown L'Aquila. The section transects a 300-m-deep Quaternary graben assumed as a "deep basin." It is placed in the southern zone of downtown L'Aquila and is mainly filled up by silt and clay. The northern zone of downtown L'Aquila is conversely characterized by stiff rock (breccia superposed onto limestone). The study's aim is to validate this upgraded subsoil model and to investigate possible 2-D seismic effects. Considering both the experimental and simulated data, all the sites exhibit a clear resonance frequency (F (sub 0) :0.4-0.6 Hz), and its amplitude (A (sub 0) ) decreases northward. The linear modeling is in good agreement with experimental data, confirming the subsoil model. In the southern zone, the A (sub 0) of the 2-D transfer function is higher than the A (sub 0) of the 1-D transfer function, which can be attributed to a bidimensional deep basin effect.


ISSN: 8755-2930
EISSN: 1944-8201
Serial Title: Earthquake Spectra
Serial Volume: 35
Serial Issue: 4
Title: The 1-D and 2-D seismic modeling of deep Quaternary basin (downtown L'Aquila, central Italy)
Affiliation: Universita degli Studi dell'Aquila, Dipartimento di Ingegneria Civile, Edile - Architettura e Ambientale, L'Aquila, Italy
Pages: 1689-1710
Published: 201911
Text Language: English
Publisher: Earthquake Engineering Research Institute, Berkeley, CA, United States
References: 50
Accession Number: 2021-006713
Categories: Seismology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. sects., strat. cols., 3 tables, geol. sketch maps
N42°19'30" - N42°34'60", E13°22'60" - E13°25'60"
Secondary Affiliation: Istituto Nazionale di Geofisica e Vulcanologia, ITA, ItalyConsiglio Nazionale delle Ricerche, Istituto di Geologia Ambientale e Geoingegneria, ITA, Italy
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2021, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 202105
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