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  • 1
    Publication Date: 2024-02-20
    Description: Highlights • We identify the largest active fault systems of the Alboran Basin. • Characterization of faults is key for accurate tsunamigenic potential estimations. • Alboran largest fault systems may generate Mw 〉 7 earthquakes. • These earthquakes have the potential to generate significant tsunami waves approaching the coast. Abstract The westernmost Mediterranean hosts part of the plate boundary between the European and African tectonic plates. Based on the scattered instrumental seismicity, this boundary has been traditionally interpreted as a wide zone of diffuse deformation. However, recent seismic images and seafloor mapping studies support that most of the plate convergence may be accommodated in a few tectonic structures, rather than in a broad region. Historical earthquakes with magnitudes Mw 〉 6 and historical tsunamis support that the low-to-moderate instrumental seismicity might also have led to underestimation of the seismogenic and tsunamigenic potential of the area. We evaluate the largest active faults of the westernmost Mediterranean: the reverse Alboran Ridge, and the strike-slip Carboneras, Yusuf and Al-Idrissi fault systems. For the first time, we use a dense grid of modern seismic data to characterize the entire dimensions of the main fault systems, accurately describe the geometry of these structures and estimate their seismic source parameters. Tsunami scenarios have been tested based on 3D-surfaces and seismic source parameters, using both uniform and heterogeneous slip distributions. The comparison of our results with previous studies, based on limited information on the fault geometry and kinematics, indicates that accurate fault geometries and heterogeneous slip distributions are needed to properly assess the seismic and tsunamigenic potential in this area. Based on fault scaling relations, the four fault systems have a large seismogenic potential, being able to generate earthquakes with Mw 〉 7. The reverse Alboran Ridge Fault System has the largest tsunamigenic potential, being able to generate a tsunami wave amplitude greater than 3 m in front of the coasts of Southern Spain and Northern Africa.
    Type: Article , PeerReviewed
    Format: text
    Format: text
    Format: text
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  • 2
    Publication Date: 2022-02-22
    Description: The westernmost Mediterranean hosts part of the plate boundary between the European and African tectonic plates. Based on the scattered instrumental seismicity, this boundary has been traditionally interpreted as a wide zone of diffuse deformation. However, recent seismic images and seafloor mapping studies support that most of the plate convergence may be accommodated in a few tectonic structures, rather than in a broad region. Historical earthquakes with magnitudes Mw 〉 6 and historical tsunamis support that the low-to-moderate instrumental seismicity might also have led to underestimation of the seismogenic and tsunamigenic potential of the area. We evaluate the largest active faults of the westernmost Mediterranean: the reverse Alboran Ridge, and the strike-slip Carboneras, Yusuf and Al-Idrissi fault systems. For the first time, we use a dense grid of modern seismic data to characterize the entire dimensions of the main fault systems, accurately describe the geometry of these structures and estimate their seismic source parameters. Tsunami scenarios have been tested based on 3D-surfaces and seismic source parameters, using both uniform and heterogeneous slip distributions. The comparison of our results with previous studies, based on limited information on the fault geometry and kinematics, indicates that accurate fault geometries and heterogeneous slip distributions are needed to properly assess the seismic and tsunamigenic potential in this area. Based on fault scaling relations, the four fault systems have a large seismogenic potential, being able to generate earthquakes with Mw 〉 7. The reverse Alboran Ridge Fault System has the largest tsunamigenic potential, being able to generate a tsunami wave amplitude greater than 3 m in front of the coasts of Southern Spain and Northern Africa.
    Description: Published
    Description: 106749
    Description: 6T. Studi di pericolosità sismica e da maremoto
    Description: JCR Journal
    Keywords: Western Mediterranean ; Seismogenic potential ; Tsunamigenic potential ; Numerical modelling ; Active faults ; Active seismic data ; 04.04. Geology ; 04.07. Tectonophysics ; 04.06. Seismology ; 05.08. Risk
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 3
    Publication Date: 2022-06-06
    Description: Miscellanea INGV - Progetto “Sale Operative Integrate e Reti di monitoraggio del futuro: l’INGV 2.0”. Report finale
    Description: L’INGV è Centro di Competenza per i fenomeni sismici, vulcanici e i maremoti per il Dipartimento di Protezione Civile Nazionale (DPC). Nell’ambito delle attività previste dall’Accordo Quadro DPCINGV 20122021 (AQ vigente), l’INGV svolge attività di sorveglianza tecnicoscientifica sulla sismicità del territorio nazionale, sui fenomeni vulcanici e sui maremoti, finalizzata ai compiti di protezione civile, in modo ininterrotto (H24 per 365 giorni l’anno). Tale attività viene realizzata con uno specifico assetto organizzativo, che consente la trasmissione in tempo reale verso il DPC di tutte le informazioni riguardanti eventi e rischi sismici, vulcanici e da maremoto di interesse per il Dipartimento stesso. La sorveglianza sismica del territorio nazionale e delle aree limitrofe è in carico all’Osservatorio Nazionale Terremoti (ONT), insieme alle comunicazioni relative agli eventi in area mediterranea e nel mondo. La sorveglianza delle aree vulcaniche campane (Campi Flegrei, Ischia, Vesuvio) e siciliane (Etna, Stromboli, Vulcano, altre isole Eolie, Pantelleria) sono rispettivamente in carico all’Osservatorio Vesuviano (OV) e all’Osservatorio Etneo (OE). Dal gennaio 2017 è diventata ufficialmente operativa anche l’attività di monitoraggio e il Servizio di allerta dei maremoti di origine sismica (Centro Allerta Tsunami CAT) con l’introduzione nella Sala INGV di Roma di una nuova unità di personale. In fase sperimentale, fino alla fine del 2016, e per i primi mesi di operatività, il personale per il Servizio di Allerta Tsunami è stato scelto all’interno del gruppo di turnisti che da anni svolgeva il Servizio di Sorveglianza Sismica; successivamente, è stato reclutato e formato nuovo personale in grado di svolgere entrambi i Servizi. A partire dal 2017 e nei due anni successivi sono stati attivati, quindi, i corsi per la formazione di nuovi Turnisti e Funzionari per i servizi di Sorveglianza Sismica e di Allerta Tsunami ed anche per i reperibili di Sala [Quintiliani et al., 2020]. La formazione del personale che partecipa al Servizio di Sorveglianza Sismica è prevista nei Piani di attività annuali relativi all’Allegato A dell’AQ vigente, tematica “Sorveglianza sismica” e quella del personale che partecipa alle attività del CAT nella tematica “Centro Allerta Tsunami (CAT)”. Inoltre, il Progetto “S.O.I.R. monitoraggio futuro” ha tra le sue finalità quella della formazione del personale delle Sale Operative INGV, essendo il WP4 “Formazione” uno dei sei working package del progetto espressamente dedicato a questo.
    Description: Published
    Description: 150-155
    Description: 1SR TERREMOTI - Sorveglianza Sismica e Allerta Tsunami
    Description: N/A or not JCR
    Keywords: Formazione turnisti ; Servizio di Sorveglianza Sismica e Allerta Tsunami di Roma ; 04. Solid Earth
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
    Location Call Number Limitation Availability
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  • 4
    Publication Date: 2024-05-16
    Description: The “Giornata ONT 2023” arises from the will to let know within INGV how many activities do people from the Osservatorio Nazionale Terremoti (ONT), and how strong is their contribution to the INGV missions: Research, Services, Education, Communication. In the nearly seven years of the current management the ONT has experienced a continuous evolutionary, sometimes complex, path. But it is always a straight path to pursue the objective of a continuous growth of the ONT. During these years the ONT has changed its name (from Centro Nazionale Terremoti – CNT, to ONT); it has experienced the coming out of some employees that moved to create the Irpinia new Section; it has lived the novelty of incoming people (example from the Centro Allerta Tsunami). It has also faced the need to overcome the limitations due to the worldwide pandemic emergency COVID19, either for the h24 services or for the research activities. Therefore in 2020 and 2021 we have only remotely attended the ONT days. The drive to be “in presenza” comes from this latter issue. We strongly want to meet, to talk face to face, to “Welcome” the young colleagues who are the injection of new ideas and perspectives, that are the necessary fuel to evolve the knowledge. As a matter of fact it emerges from the DNA of the ONT, i.e. the inclusiveness and the multidisciplinarity. This latter is widely testified by the ONT activities that are shared among the three Departments and their strategic objectives. The agenda of the “Giornata ONT 2023” has specifically emphasized the variety of the technical and scientific contents, that for sake of simplicity have been collected in the following themes: • Infrastructures, Data­Sharing and Laboratories • Analysis, Modelling, Interpretation of Geophysical Phenomena • National and International Projects (Research Results and Products from Completed Projects; Ongoing Projects) • Society ­ Communication, Dissemination, Emergency Management • Seismic Surveillance And Tsunami Warning Overall, the contributions have been 100, most of which are posters (77) and the remaining (23) in different exhibit formats. The wide interest about the proposed contents and the positive feedback from the attendance, pushed the decision to collect and publish the contributions in a Miscellanea INGV, where the documents can be easily found. And we are finally ready to make the Miscellanea available to the reader. I would warmly thank the Authors for their enthusiastic acceptance to contribute, the Conveners of the “Giornata ONT 2023” Sessions for their availability to organise and manage the submitted poster/exhibits, the Editorial Board members for their hidden work that led to this Miscellanea. In conclusion, let me spend a few words about my personal journey as Director of the ONT. After 2504 days it has come to an end and the “Giornata ONT 2023” and the Miscellanea are, somehow, the cherry on top. It is really difficult to say “Thanks” one by one to the people who helped me along this complex and long path. So, please, let me simply say Grazie a tutti voi! Salvatore Stramondo - Director ONT (2017-2023)
    Description: Published
    Description: 1-206
    Description: N/A or not JCR
    Keywords: Osservatorio Nazionale Terremoti ; GIORNATA ONT 2023 ; Research scientific and service ; 01.01. Atmosphere ; 04.06. Seismology ; 04.08. Volcanology ; 05.09. Miscellaneous ; ; Research scientific and
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
    Location Call Number Limitation Availability
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