M. Cesarano, A. Porchia, G. Romagnoli, E. Peronace, A. Mendicelli, M. Nocentini, G. Naso, S. Castenetto, S. Catalano, M. Moscatelli
{"title":"Multiscale geothematic maps for using the database from the Italian Seismic Microzonation Project: an example of application in the Calabria Region (Southern Italy)","authors":"M. Cesarano, A. Porchia, G. Romagnoli, E. Peronace, A. Mendicelli, M. Nocentini, G. Naso, S. Castenetto, S. Catalano, M. Moscatelli","doi":"10.3301/ijg.2022.03","DOIUrl":"https://doi.org/10.3301/ijg.2022.03","url":null,"abstract":"","PeriodicalId":49317,"journal":{"name":"Italian Journal of Geosciences","volume":" ","pages":""},"PeriodicalIF":1.8,"publicationDate":"2022-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49188036","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
G. Riccio, S. Pucillo, A. Fodarella, R. Cogliano, L. Improta
{"title":"Earthquake weak motions and noise measurements unravel significant site amplification effects in the Val d'Agri complex basin (southern Italy)","authors":"G. Riccio, S. Pucillo, A. Fodarella, R. Cogliano, L. Improta","doi":"10.3301/ijg.2022.08","DOIUrl":"https://doi.org/10.3301/ijg.2022.08","url":null,"abstract":"","PeriodicalId":49317,"journal":{"name":"Italian Journal of Geosciences","volume":" ","pages":""},"PeriodicalIF":1.8,"publicationDate":"2022-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47851827","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This study takes advantage of the available information for an example, well-known, site in Greece (TST site at Euroseistest) to illustrate the epistemic variability in probabilistic seismic hazard assessment (PSHA) estimates. The purpose is not to perform an exhaustive site-specific PSHA at this particular site, but to investigate the sensitivity of the results to the approach used for including site effects, from basic ones to more demanding and realistic ones, in order to better appreciate the “benefits” versus the required costs and efforts of each approach. The TST site, located at the center of the Mygdonian basin in North-Eastern Greece is characterised by soft shallow soils over thick, medium stiffness deposits with a complex underground geometry, resting on very hard bedrock. Three different levels are considered for the incorporation of site response, from level 0 (generic or partially generic) to site-specific ones, with linear (level 1) or non-linear (level 2) site response analysis. The basic methods rely on one or several site proxies (V S30 , V SZ and f 0 ), whereas the most complex ones couple site response assessment (instrumental or numerical, implying site-specific characterization or instrumentation) with various reference rock hazard adjustments (single-station sigma, host-to-target adjustments, depth correction). Results are compared in terms of Uniform Hazard Spectra for a 5000 years return period, a typical value for critical facilities. For each level, the epistemic uncertainties are described and their impacts on hazard estimates are quantified. The use of the V S30 proxy in ground-motion prediction equations (GMPEs) leads to a clear underestimation of the hazard for the linear case (i.e., short return periods), especially around the site fundamental period, because of resonance and basin effects. On the other hand, soil nonlinearity largely impacts the hazard estimates, and linear amplification approach leads to an overestimation of the hazard, with unrealistic high levels at very long return periods. Site-specific hazard estimates for thick, Euroseistest-like sites, with complex geometry and rheology, are thus shown to come up against several additional epistemic uncertainties implying a large approach-to-approach variability. This may lead to increased hazard estimates, counterbalancing the decrease due to the use of reduced, single-site aleatory uncertainty in reference rock hazard estimates. For the time being, it thus looks unrealistic to promise a systematic reduction in hazard estimates with site-specific studies, while it might also indicate that uncertainties in generic hazard estimates could presently be underestimated.
{"title":"Site-Specific PSHA: Combined Effects of Single-Station-Sigma, Host-to-Target Adjustments and Nonlinear Behavior. A case study at Euroseistest","authors":"C. Aristizábal, P. Bard, C. Beauval","doi":"10.3301/ijg.2022.02","DOIUrl":"https://doi.org/10.3301/ijg.2022.02","url":null,"abstract":"This study takes advantage of the available information for an example, well-known, site in Greece (TST site at Euroseistest) to illustrate the epistemic variability in probabilistic seismic hazard assessment (PSHA) estimates. The purpose is not to perform an exhaustive site-specific PSHA at this particular site, but to investigate the sensitivity of the results to the approach used for including site effects, from basic ones to more demanding and realistic ones, in order to better appreciate the “benefits” versus the required costs and efforts of each approach. The TST site, located at the center of the Mygdonian basin in North-Eastern Greece is characterised by soft shallow soils over thick, medium stiffness deposits with a complex underground geometry, resting on very hard bedrock. Three different levels are considered for the incorporation of site response, from level 0 (generic or partially generic) to site-specific ones, with linear (level 1) or non-linear (level 2) site response analysis. The basic methods rely on one or several site proxies (V S30 , V SZ and f 0 ), whereas the most complex ones couple site response assessment (instrumental or numerical, implying site-specific characterization or instrumentation) with various reference rock hazard adjustments (single-station sigma, host-to-target adjustments, depth correction). Results are compared in terms of Uniform Hazard Spectra for a 5000 years return period, a typical value for critical facilities. For each level, the epistemic uncertainties are described and their impacts on hazard estimates are quantified. The use of the V S30 proxy in ground-motion prediction equations (GMPEs) leads to a clear underestimation of the hazard for the linear case (i.e., short return periods), especially around the site fundamental period, because of resonance and basin effects. On the other hand, soil nonlinearity largely impacts the hazard estimates, and linear amplification approach leads to an overestimation of the hazard, with unrealistic high levels at very long return periods. Site-specific hazard estimates for thick, Euroseistest-like sites, with complex geometry and rheology, are thus shown to come up against several additional epistemic uncertainties implying a large approach-to-approach variability. This may lead to increased hazard estimates, counterbalancing the decrease due to the use of reduced, single-site aleatory uncertainty in reference rock hazard estimates. For the time being, it thus looks unrealistic to promise a systematic reduction in hazard estimates with site-specific studies, while it might also indicate that uncertainties in generic hazard estimates could presently be underestimated.","PeriodicalId":49317,"journal":{"name":"Italian Journal of Geosciences","volume":" ","pages":""},"PeriodicalIF":1.8,"publicationDate":"2022-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43838355","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
M. Mancini, Maria Chiara Caciolli, I. Gaudiosi, Giorgio Andrea Alleanza, G. Cavuoto, M. Coltella, G. Cosentino, V. Di Fiore, A. d'Onofrio, Francesco Gargiulo, G. Milana, A. Pietrosante, P. Pompa, F. Silvestri, M. Vassallo
{"title":"Erratum to \"Seismic microzonation in a complex volcano-tectonic setting: the case of northern and western Ischia island (southern Italy)\"(Italian Journal of Geosciences, 140 (3), 2021, 382-408)","authors":"M. Mancini, Maria Chiara Caciolli, I. Gaudiosi, Giorgio Andrea Alleanza, G. Cavuoto, M. Coltella, G. Cosentino, V. Di Fiore, A. d'Onofrio, Francesco Gargiulo, G. Milana, A. Pietrosante, P. Pompa, F. Silvestri, M. Vassallo","doi":"10.3301/ijg.2022.09","DOIUrl":"https://doi.org/10.3301/ijg.2022.09","url":null,"abstract":"","PeriodicalId":49317,"journal":{"name":"Italian Journal of Geosciences","volume":" ","pages":""},"PeriodicalIF":1.8,"publicationDate":"2022-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45037803","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
R. Spacagna, A. Porchia, S. Fabozzi, M. Cesarano, E. Peronace, G. Romagnoli
{"title":"Seismic liquefaction assessment in Calabria (Southern Italy): a geostatistical approach at regional and sub-regional scale","authors":"R. Spacagna, A. Porchia, S. Fabozzi, M. Cesarano, E. Peronace, G. Romagnoli","doi":"10.3301/ijg.2022.04","DOIUrl":"https://doi.org/10.3301/ijg.2022.04","url":null,"abstract":"","PeriodicalId":49317,"journal":{"name":"Italian Journal of Geosciences","volume":" ","pages":""},"PeriodicalIF":1.8,"publicationDate":"2022-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43134927","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. Schito, Achraf Atouabat, D. Muirhead, Rocco Calcagni, R. Galimberti, C. Romano, A. Spina, S. Corrado
{"title":"An insight on the polyphase thermal history of the Internal Rif (Northern Morocco) through Raman micro-spectroscopy investigation","authors":"A. Schito, Achraf Atouabat, D. Muirhead, Rocco Calcagni, R. Galimberti, C. Romano, A. Spina, S. Corrado","doi":"10.3301/ijg.2022.01","DOIUrl":"https://doi.org/10.3301/ijg.2022.01","url":null,"abstract":"","PeriodicalId":49317,"journal":{"name":"Italian Journal of Geosciences","volume":" ","pages":""},"PeriodicalIF":1.8,"publicationDate":"2022-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45829235","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
M. Casalini, S. Tommasini, L. Guarnieri, R. Avanzinelli, M. Mattei, S. Conticelli
{"title":"Subduction-related lamproitic signature in intraplate-like volcanic rocks: the case study of the Tallante alkali basalts, Betic Chain, South-Eastern Spain","authors":"M. Casalini, S. Tommasini, L. Guarnieri, R. Avanzinelli, M. Mattei, S. Conticelli","doi":"10.3301/ijg.2022.06","DOIUrl":"https://doi.org/10.3301/ijg.2022.06","url":null,"abstract":"","PeriodicalId":49317,"journal":{"name":"Italian Journal of Geosciences","volume":" ","pages":""},"PeriodicalIF":1.8,"publicationDate":"2022-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46992356","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. Stroscio, G. Barone, G. Guidi, M. Fugazzotto, R. Occhipinti, F. Carnemolla, S. Marchese, P. Mazzoleni
{"title":"Photogrammetric Surveys and GIS application for Cultural Heritage conservation management: a case study from Catania?s historical buildings","authors":"A. Stroscio, G. Barone, G. Guidi, M. Fugazzotto, R. Occhipinti, F. Carnemolla, S. Marchese, P. Mazzoleni","doi":"10.3301/ijg.2021.06","DOIUrl":"https://doi.org/10.3301/ijg.2021.06","url":null,"abstract":"","PeriodicalId":49317,"journal":{"name":"Italian Journal of Geosciences","volume":" ","pages":""},"PeriodicalIF":1.8,"publicationDate":"2021-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49112824","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Evaluation of building seismic retrofitting costs foundedon experimental data. The case study of \"San Benedetto\" School (Norcia, Italy)","authors":"G. Falcone, V. Vacca, F. Mori, G. Naso, D. Spina","doi":"10.3301/ijg.2021.09","DOIUrl":"https://doi.org/10.3301/ijg.2021.09","url":null,"abstract":"","PeriodicalId":49317,"journal":{"name":"Italian Journal of Geosciences","volume":" ","pages":""},"PeriodicalIF":1.8,"publicationDate":"2021-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41656776","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Vincenzo De Santis, G. Scardino, Marco Meschis, J. Ortiz, Y. Sánchez-Palencia, M. Caldara
{"title":"Refining the middle-late Pleistocene chronology of marine terraces and uplift history in a sector of the Apulian foreland (southern Italy) by applying a synchronous correlation technique and amino acid racemization to Patella spp. and Thetystrombus latus","authors":"Vincenzo De Santis, G. Scardino, Marco Meschis, J. Ortiz, Y. Sánchez-Palencia, M. Caldara","doi":"10.3301/ijg.2021.05","DOIUrl":"https://doi.org/10.3301/ijg.2021.05","url":null,"abstract":"","PeriodicalId":49317,"journal":{"name":"Italian Journal of Geosciences","volume":" ","pages":""},"PeriodicalIF":1.8,"publicationDate":"2021-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44182032","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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