Geophysical reconstruction of buried geological features and site effects estimation of the Middle Valle Umbra basin (central Italy)

Famiani, Daniela; Brunori, Carlo Alberto; Pizzimenti, Luca; Cara, F.; Caciagli, Marco; Melelli, Laura; Mirabella, Francesco; Barchi, Massimiliano R.

doi:10.1016/j.enggeo.2020.105543

Cited by 9 publications

(8 citation statements)

References 42 publications

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“…The ground subsidence correlated with the intense artificial water withdrawal from the deep local aquifer and the shape of the deformation gives information about the shapes of bedrock geometries hidden under the valley deposits. [50] confirmed that under valley sediments is present the NW-SE trending fault system SE dipping faults dislocating northern-eastern lithologies of the Mt. Subasio and in the NW dipping of the Cinque Querce ridge (Figure 1).…”

Section: Discussionsupporting

confidence: 57%

“…This fault system is visible along the M.Subasio and Mt. Cinque Querce ridge slopes, forms the NUB graben, and is probably also hidden under the Quaternary sediments filling the NUB [50]. The activity of these structures is also suggested by the distribution of both instrumental and historical seismicity (Fig 1b-e) [51].…”

Section: Case Studymentioning

confidence: 89%

“…Among the long sequence of earthquakes that struck the valley (CPTI15 -https://emidius.mi.ingv.it/CPTI15-DBMI15/), this area experienced in the 19th century two major earthquakes with the epicenters here localized: the 13 January 1832 ME=6.3; I0=X, and the 12 February 1854 ME=5.6; I0=VII (Figure 2b). In recent times the earthquake sequences affecting the Apennine sector East of the NUB and the Monte Cinque Querce Ridge (Figure 1e), hit the valley and the urbanized areas, such as the 26 September 1997 (Mw 6.0), often causing considerable damage to civil and industrial structures as well as to technological networks mainly due to local amplification effects [50].…”

Section: Case Studymentioning

confidence: 99%

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Spatiotemporal Evolution of Ground Subsidence and Extensional Basin Bedrock Organization: An Application of Multitemporal Multi-Satellite SAR Interferometry

Brunori¹,

Murgia²

2023

Preprint

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Since the early 1990s, the European (ESA) and Italian (ASI) space agencies have managed and distributed a huge amount of satellite-recorded SAR data to the research community and private industries. Moreover, the availability of advanced cloud computing services implementing different multi-temporal SAR interferometry techniques allows the generation of deformation time series from massive SAR images. We exploit the information provided by a large PS dataset to determine the temporal trend of ground deformation and the relative deformation rate with millimetric accuracy to analyse the spatial and temporal distribution of land subsidence induced by water pumping from a deep confined aquifer in the Northern Valle Umbra Basin (Central Italy), exploiting 24 years of Permanent Scatterers – Interferometric SAR data archives. The SAR images were acquired between 1992 and 2016 by satellite ERS1/2, ENVISAT and Sentinel 1 ESA missions, and the COSMO-SkyMed ASI mission). We observe ground velocities and deformation geometries between 1992 and 2016, with displacements of more than 70 cm and velocities of up to 55 mm/yr and the results suggest that the shape and position of the surface ground displacement are controlled by the fault activity hidden under the valley deposits.

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Section: Discussionsupporting

confidence: 57%

Section: Case Studymentioning

confidence: 89%

Section: Case Studymentioning

confidence: 99%

See 1 more Smart Citation

Spatiotemporal Evolution of Ground Subsidence and Extensional Basin Bedrock Organization: An Application of Multitemporal Multi-Satellite SAR Interferometry

Brunori¹,

Murgia²

2023

Preprint

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“…Due to its lower cost, environmental friendliness and relative ease of computing with respect to other geotechnical and geophysical methods, the H/V technique has been used extensively for geologic and engineering studies (e.g., Leyton et al, 2013;Molnar et al, 2018;Famiani et al, 2020;Molnar et al, 2020;Rohmer et al, 2020). Motivated by the increasing use of the H/V method, standard criteria for data acquisition, processing and interpretation were provided in the frame of the European project SESAME (Site EffectS assessment using AMbient Excitations) (SESAME, 2004;Bard, 2008).…”

Section: Introductionmentioning

confidence: 99%

A new autoregressive moving average modeling of H/V spectral ratios to estimate the ground resonance frequency

Ugalde

Egozcue

Ranero

2021

Engineering Geology

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We propose a new method to estimate the horizontal-to-vertical (H/V) spectral ratio using microtremor measurements. The technique is based on modeling the H/V transfer function by means of an AutoRegressive Moving Average (ARMA) filter. As compared with the conventional, Fourier-based spectra processing routines, this method is efficient in extracting the fundamental resonant frequency with a higher spectral resolution. We demonstrate its usefulness by an application to several sites in northeastern Iberian Peninsula. For the data sets examined, our approach shows improvement over the Fourier transform-based method under adverse experimental conditions. We conclude that the new technique provides robust estimates of the fundamental resonance frequency and can be effective to characterize empirically the unconsolidated sediment thickness and bedrock geometry.

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“…For this reason, the use of standard methods must be pursued in a weighted manner, highlighting the limits when applied to complex geological contexts. In the last two decades, array-processing techniques applied to seismic noise recorded by small array (maximum aperture of the array of about one hundred meters) have been usedto characterize the surface-wave propagation (La Rocca et al, 2010;Poggi and Fäh, 2010;Galluzzo et al, 2015) or the site effects (Picozzi et al, 2009;Maresca et al, 2014;Famiani et al, 2020). In volcanic areas, where lithological heterogeneities at the small scale are mostly expected, array techniques have been used to extract information about the shallow subsoil structure (i.e.…”

Section: Introductionmentioning

confidence: 99%

Shear wave velocity and attenuation structure of Ischia island using broad band seismic noise records

Nardone

Manzo²,

Galluzzo

et al. 2020

Journal of Volcanology and Geothermal Research

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In volcanic areas, accurate localization of earthquakes requires detailed velocity and, possibly, attenuation models, taking into account wide lithological variability and high geothermal gradients. Ischia island (Campania region, Italy) is a seismically-active volcano recently affected by a Mw 3.9 event (Casamicciola, August 21, 2017, 1 km depth). Due to the lack of a specific velocity model, the earthquakes occurred on the island were localized using the one developed for the nearby Campi Flegrei caldera. The aim of this work is the definition of a mean representative 1D shear-wave velocity (Vs) and attenuation (Q) model of the shallower crust (up to 2 km depth) of Ischia. Seismic noise array and spectral ratios techniques were applied to broad band seismic signals recorded by temporary and permanent networks updated after the August 2017 earthquake. The values of both shear-wave velocity (Vs) and quality factor (Q) are realistic, with Q values comparable with those obtained for Campi Flegrei and Stromboli volcanic areas. By taking into account stratigraphic information from deep wells and ultrasonic measurements of velocity on granite and trachytic lava samples, a geological interpretation of the resulting velocity model is provided. Such a model can have significant implications for understanding the dynamics of a volcano, mainly those leading to seismic activity.

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Geophysical reconstruction of buried geological features and site effects estimation of the Middle Valle Umbra basin (central Italy)

Cited by 9 publications

References 42 publications

Spatiotemporal Evolution of Ground Subsidence and Extensional Basin Bedrock Organization: An Application of Multitemporal Multi-Satellite SAR Interferometry

Spatiotemporal Evolution of Ground Subsidence and Extensional Basin Bedrock Organization: An Application of Multitemporal Multi-Satellite SAR Interferometry

A new autoregressive moving average modeling of H/V spectral ratios to estimate the ground resonance frequency

Shear wave velocity and attenuation structure of Ischia island using broad band seismic noise records

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