Publication Date:
2023-05-25
Description:
This study investigates site effects for developing predictive models of site response, for
both research purposes and future geognostic applications, by using a statistical analysis
method to define possible correlations between different kinds of seismological and geological
data. The test area is the intermontane Montereale basin (Abruzzo region, Italy),
which was investigated for site effects studies and microzonation purposes because it has
been affected by the 2016–2017 Central Italy seismic sequence. The available geological
and geophysical information include geological profiles, thickness and geometry of the
sedimentary infilling, shear-wave velocity profiles, downhole and borehole data. Seismological
analysis (such as earthquake and noise spectral ratios, duration lengthening of
seismic signals) has been performed to retrieve parameters useful for seismic response. A
GIS database has been created to better manage all this information, by georeferencing all
the measurement points and results. Finally, Factor Analysis multivariate technique was
used to evaluate the most important site effect indicators, in terms of correlation between
the involved parameters, and to deduce how the geological context influences their behavior.
The performed analysis highlighted the statistical variability of the strong motion, that
depends on the position inside the basin, over the Holocene deposits, and on the edges, at
the limit between different lithologies. Moreover, some of the correlations between geological
and geophysical indicators are strongly coherent with the basin geological features.
Description:
Published
Description:
1875–1901
Description:
5T. Sismologia, geofisica e geologia per l'ingegneria sismica
Description:
JCR Journal
Keywords:
Site effects
;
Spectral ratio
;
Seismic noise
;
Montereale
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
