Extensive surface geophysical prospecting for seismic microzonation

Caielli, Grazia; Franco, R. de; Fiore, Vincenzo Di; Albarello, Dario; Catalano, Stefano; Pergalani, F.; Cavuoto, Giuseppe; Cercato, Michele; Compagnoni, Marco Antônio; Facciorusso, Johann; Famiani, Daniela; Ferri, Fernando; Imposa, Sebastiano; Martini, Guido; Paciello, A.; Paolucci, Enrico; Passeri, Federico; Piscitelli, S.; Puzzilli, Luca Maria; Vassallo, Maurizio

doi:10.1007/s10518-020-00866-4

Cited by 23 publications

(16 citation statements)

References 22 publications

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“…Another important site parameter related to both stiffness distribution in the subsurface and depth of the seismic bedrock is the fundamental resonance frequency (f0). The paper by Caielli et al (2020) describes how a large number of geophysical data were acquired in a short time during the project to evaluate the Vs and f0 distributions in the investigated municipalities. The authors provided description of the guidelines implemented for geophysical surveys and reported about the encountered problems and the identified weak points in data acquisition and result interpretations that required improvements or cautions.…”

mentioning

confidence: 99%

Guest editorial: seismic microzonation of Central Italy following the 2016–2017 seismic sequence

Hailemikael

Amoroso

Gaudiosi

2020

Bull Earthquake Eng

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mentioning

confidence: 99%

Guest editorial: seismic microzonation of Central Italy following the 2016–2017 seismic sequence

Hailemikael

Amoroso

Gaudiosi

2020

Bull Earthquake Eng

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“…The MS3 studies of central Italy produced a huge amount of Vs data measured on the different gt_units. The Vs values coming from the 138 MS3 studies (Caielli et al 2019) were collected in a database, which allowed us to perform for the first time the statistical analysis of their behavior in the area. Vs values have been assessed by considering surface and borehole experimental procedures.…”

Section: Statistical Analysis Of Vs Values Of the Engineering-geologimentioning

confidence: 99%

Geological and geotechnical models definition for 3rd level seismic microzonation studies in Central Italy

Amanti

Muraro

Roma

et al. 2020

Bull Earthquake Eng

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The 2016-2017 seismic events that struck central Italy led the Government to carry out a project to produce the third level Seismic Microzonation studies in 138 municipalities. These activities have involved many experts in different disciplines such as geology, geomorphology, geophysics, seismology and geotechnical engineering. This project represented the first opportunity to perform nationally coordinated third level Seismic Microzonation studies over a wide area in a quite short time (6 months). It provided the chance to improve methodological procedures, to test the reliability of methods and models for site response analyses and to produce a huge amount of validated data. This paper focuses on the contribution of geological disciplines and concerns: (a) the definition of the main "morphostructural domains" of the Central-Northern Apennines; (b) the creation of an archive of all the lithostratigraphic units occurring in the study area with their conversion into engineering-geological units and their distribution in the different morphostructural domains; (c) the construction of the reference geological and geotechnical models, which are essential to classify the territory into seismically homogeneous microzones and to perform the successive 1D and 2D numerical analyses of the local site response. The geophysical dataset acquired for the study allowed a first statistical characterization of the Vs values typical of the engineering-geological units identified in this study. Some examples of the recurrent geological and geotechnical models are shown to explain the complexity and variety of the geological and geomorphological features of the investigated area and to highlight the different seismostratigraphic behavior of rocks and cover terrains. The analysis of third level Seismic Microzonation data made it possible to identify recurrent subsoil models and to note the main stratigraphic and morphological control-factors of the ground motion modification in the different morphostructural domains.

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“…Along each curve, the frequency peaks having a spectral ratio value greater than 2 were considered and the fundamental frequency value (F 0 ) for each site was inferred from the lowest frequency among all peaks. To efficiently perform SR and MASW investigations, the integrated acquisition geometry described in Caielli et al 2020 was adopted (geophone spacing of 2-3 m, 3 split spread source points inside the seismic line, 4 source points in reciprocal configuration at the two ends of profiles and off-end). For MASW, only the data from the off-end sources were used.…”

Section: Geophysical Investigationsmentioning

confidence: 99%

The seismic microzonation study of Pescara del Tronto (Central Italy) during and after the Central Italy earthquake sequence.

Amanti

Puzzilli

Chiessi

et al. 2020

Bull Earthquake Eng

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Site effects in consequence of the 2016-2018 Central Italy seismic sequence "marked the fate" of many villages located close to the epicenters along the Apennine chain. Pescara del Tronto, a small settlement located on a mountain slope in the municipality of Arquata del Tronto, (AP) is very representative of such territories since, early after the onset of the seismic sequence, suffered very impressive site effects, including a large seismicallyinduced debris flow and a high number of small volume landslides. This paper describes the main results of the scientific activities carried out by the authors in this locality in the framework of the unprecedented large-scale Seismic Microzonation project funded by Italian Government in Central Italy for 138 territories. Through an intense field activity, the geological and geomorphologic setting of the study area were revised and updated, including a landslide susceptibility assessment that helped the Italian Department of Civil Protection in the emergency management for temporary housing and, later on, was included in the 3rd Level Seismic Microzonation study implemented by authors while the seismic sequence was still ongoing. A very detailed and reliable subsoil model for this municipality was defined, despite difficulties faced in performing direct and indirect investigations due to the safety restrictions for many areas. The Local Seismic Site response was finally assessed for this locality and the results discussed. A key role in the occurrence of strong site effects into Pescara del Tronto has been played by quaternary deposits having an unexpected heterogeneity under the old village.

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Extensive surface geophysical prospecting for seismic microzonation

Cited by 23 publications

References 22 publications

Guest editorial: seismic microzonation of Central Italy following the 2016–2017 seismic sequence

Guest editorial: seismic microzonation of Central Italy following the 2016–2017 seismic sequence

Geological and geotechnical models definition for 3rd level seismic microzonation studies in Central Italy

The seismic microzonation study of Pescara del Tronto (Central Italy) during and after the Central Italy earthquake sequence.

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