since over a century the Calabrian region is going through a period of relative seismic quietness... more since over a century the Calabrian region is going through a period of relative seismic quietness, its seismic hazard is at the highest levels in the Mediterranean basin due to several catastrophic earthquakes present in the historical records. In consideration of the mass movements described above, a gravity recording station was installed in Cosenza (Fig. 1) in order to contribute to the geophysical monitoring of this seismic region. The recorded signals could allow in fact to reveal tidal anomalies correlated with the difference between some local feature of the lithosphere and/or geodynamic activity and the corresponding characteristics of the models used to calculate the reference gravity tide. Albano et al. (2014) present and discuss the results of the analysis of less than two years
The present work is supported and funded by the Italian Ministry of Education, University and Res... more The present work is supported and funded by the Italian Ministry of Education, University and Research (MIUR) under the research project PON01-02710 "MASSIMO" - "Monitoraggio in Area Sismica di SIstemi MOnumentali".
The sea level perturbations generated by the large M 9.0, Tohoku-Oki earthquake of March, 11th, 2... more The sea level perturbations generated by the large M 9.0, Tohoku-Oki earthquake of March, 11th, 2011, in the Mediterranean sea, have been investigated by tide gauge data. The tidal records, acquired by 26 stations located along the coast of Italy, managed by ISPRA (Institute for Environmental Protection and Research), have been analyzed through the Empirical Mode Decomposition. After an inverse barometric correction was applied and considered the effects of wind velocity and direction at the tidal stations, we found that the abrupt changes in amplitude and frequency of the tide, which lasted for several hours, were caused by the arrival of the perturbations at the recording stations, approximately 40-50 hours after the main shock and about 13 hours after its arrival at Gibraltar, namely about 45 hours after the origin time of the earthquake. In particular, this tsunami caused two main effects in the Mediterranean: the generation of frequency fluctuations, that destabilized the diurn...
Abstract In this paper, the non-invasive system MASSIMO is presented for the monitoring and the s... more Abstract In this paper, the non-invasive system MASSIMO is presented for the monitoring and the seismic vulnerability mitigation of the cultural heritage. It integrates ground-based, airborne and spaceborne remote sensing tools with geophysical and in situ surveys to provide the multi-spatial (regional, urban and building scales) and multi-temporal (long-term, short-term, near-real-time and real-time scales) monitoring of test areas and buildings. The measurements are integrated through web-based GIS and 3D visual platforms to support decision-making stakeholders involved in urban planning and structural requalification. An application of this system is presented over the Calabria region for the town of Cosenza and a test historical complex.
Il presente lavoro e finanziato dal Ministero dell'Universita, dell'Istruzione e della Ri... more Il presente lavoro e finanziato dal Ministero dell'Universita, dell'Istruzione e della Ricerca (MIUR) nell'ambito del programma PON R&C 2007-2013 che finanzia al 100% il progetto PON "MASSIMO"-"Monitoraggio in Area Sismica di Sistemi Monumentali"
L’installazione e gestione di una rete di sismografi finalizzata al monitoraggio della sismicità ... more L’installazione e gestione di una rete di sismografi finalizzata al monitoraggio della sismicità della Calabria risale agli inizi degli anni ‘70, quando furono attribuiti come compiti prima all’IRPI-CNR e quindi al Dipartimento di Scienze della Terra dell’Università della Calabria (UniCal). Tuttavia le prime stazioni furono attivate solo a partire dal 1978, sostanzialmente nell’ambito del Progetto Finalizzato Geodinamica (PFG). La crescita della struttura fu rallentata dalla carenza di personale tecnico, problema che tuttora rappresenta una difficoltà e, dopo la chiusura del PFG, anche di risorse finanziarie. La strumentazione che era stata acquisita nelle fasi precedenti, integrata anche con un contributo concesso una tantum dalla Regione Calabria, portò alla realizzazione verso la metà degli anni ‘80 della rete rappresentata in Figura 1, nel periodo della sua massima espansione. Si trattava di una rete analogica con sensori a sola componente verticale; la trasmissione dei segnali ...
... Page 2. 206 i>]i;r paolo <;. bruno hi alii 40"40f Fin. I - Location ol ilio andini... more ... Page 2. 206 i>]i;r paolo <;. bruno hi alii 40"40f Fin. I - Location ol ilio andini shots (MC94-30) ami of the-OVO iht'ee-component recording station. ... Lei., 16(1). 1317-1320. FlNETTi I. (¿ Morelli С. (1974) - l-splorazioiie sismica a ri/lessio/te dei (ìoljì di Napoli e Pozzuoli. Boll. Geol. ...
27,646 P- and 15,025 S-wave readings obtained from 2238 earthquakes and 84 artificial sources wer... more 27,646 P- and 15,025 S-wave readings obtained from 2238 earthquakes and 84 artificial sources were used to perform tomographic inversion of P velocity and VP/VS ratio in the crust of Calabrian Arc by Thurber’s inversion algorithm. For this investigation a seismic database with more than twelve-thousand events was built, including all local earthquake data recorded between 1978 and 2001 at all stations of the national and local networks in south Italy. Spread Function computations and checkerboard and restore tests proved higher accuracy of velocity estimates in the upper 40 km beneath Calabrian Arc compared to previous investigations in the same area. The obtained three-dimensional velocity model furnished remarkable improvement of hypocenter locations of the global earthquake dataset (RMS reduction of 38% respect to 1D locations) and greater accuracy in the definition of microplates and tectonic units in the study region. Velocity domains evidenced by our tomography correspond to t...
since over a century the Calabrian region is going through a period of relative seismic quietness... more since over a century the Calabrian region is going through a period of relative seismic quietness, its seismic hazard is at the highest levels in the Mediterranean basin due to several catastrophic earthquakes present in the historical records. In consideration of the mass movements described above, a gravity recording station was installed in Cosenza (Fig. 1) in order to contribute to the geophysical monitoring of this seismic region. The recorded signals could allow in fact to reveal tidal anomalies correlated with the difference between some local feature of the lithosphere and/or geodynamic activity and the corresponding characteristics of the models used to calculate the reference gravity tide. Albano et al. (2014) present and discuss the results of the analysis of less than two years
The present work is supported and funded by the Italian Ministry of Education, University and Res... more The present work is supported and funded by the Italian Ministry of Education, University and Research (MIUR) under the research project PON01-02710 "MASSIMO" - "Monitoraggio in Area Sismica di SIstemi MOnumentali".
The sea level perturbations generated by the large M 9.0, Tohoku-Oki earthquake of March, 11th, 2... more The sea level perturbations generated by the large M 9.0, Tohoku-Oki earthquake of March, 11th, 2011, in the Mediterranean sea, have been investigated by tide gauge data. The tidal records, acquired by 26 stations located along the coast of Italy, managed by ISPRA (Institute for Environmental Protection and Research), have been analyzed through the Empirical Mode Decomposition. After an inverse barometric correction was applied and considered the effects of wind velocity and direction at the tidal stations, we found that the abrupt changes in amplitude and frequency of the tide, which lasted for several hours, were caused by the arrival of the perturbations at the recording stations, approximately 40-50 hours after the main shock and about 13 hours after its arrival at Gibraltar, namely about 45 hours after the origin time of the earthquake. In particular, this tsunami caused two main effects in the Mediterranean: the generation of frequency fluctuations, that destabilized the diurn...
Abstract In this paper, the non-invasive system MASSIMO is presented for the monitoring and the s... more Abstract In this paper, the non-invasive system MASSIMO is presented for the monitoring and the seismic vulnerability mitigation of the cultural heritage. It integrates ground-based, airborne and spaceborne remote sensing tools with geophysical and in situ surveys to provide the multi-spatial (regional, urban and building scales) and multi-temporal (long-term, short-term, near-real-time and real-time scales) monitoring of test areas and buildings. The measurements are integrated through web-based GIS and 3D visual platforms to support decision-making stakeholders involved in urban planning and structural requalification. An application of this system is presented over the Calabria region for the town of Cosenza and a test historical complex.
Il presente lavoro e finanziato dal Ministero dell'Universita, dell'Istruzione e della Ri... more Il presente lavoro e finanziato dal Ministero dell'Universita, dell'Istruzione e della Ricerca (MIUR) nell'ambito del programma PON R&C 2007-2013 che finanzia al 100% il progetto PON "MASSIMO"-"Monitoraggio in Area Sismica di Sistemi Monumentali"
L’installazione e gestione di una rete di sismografi finalizzata al monitoraggio della sismicità ... more L’installazione e gestione di una rete di sismografi finalizzata al monitoraggio della sismicità della Calabria risale agli inizi degli anni ‘70, quando furono attribuiti come compiti prima all’IRPI-CNR e quindi al Dipartimento di Scienze della Terra dell’Università della Calabria (UniCal). Tuttavia le prime stazioni furono attivate solo a partire dal 1978, sostanzialmente nell’ambito del Progetto Finalizzato Geodinamica (PFG). La crescita della struttura fu rallentata dalla carenza di personale tecnico, problema che tuttora rappresenta una difficoltà e, dopo la chiusura del PFG, anche di risorse finanziarie. La strumentazione che era stata acquisita nelle fasi precedenti, integrata anche con un contributo concesso una tantum dalla Regione Calabria, portò alla realizzazione verso la metà degli anni ‘80 della rete rappresentata in Figura 1, nel periodo della sua massima espansione. Si trattava di una rete analogica con sensori a sola componente verticale; la trasmissione dei segnali ...
... Page 2. 206 i>]i;r paolo <;. bruno hi alii 40"40f Fin. I - Location ol ilio andini... more ... Page 2. 206 i>]i;r paolo <;. bruno hi alii 40"40f Fin. I - Location ol ilio andini shots (MC94-30) ami of the-OVO iht'ee-component recording station. ... Lei., 16(1). 1317-1320. FlNETTi I. (¿ Morelli С. (1974) - l-splorazioiie sismica a ri/lessio/te dei (ìoljì di Napoli e Pozzuoli. Boll. Geol. ...
27,646 P- and 15,025 S-wave readings obtained from 2238 earthquakes and 84 artificial sources wer... more 27,646 P- and 15,025 S-wave readings obtained from 2238 earthquakes and 84 artificial sources were used to perform tomographic inversion of P velocity and VP/VS ratio in the crust of Calabrian Arc by Thurber’s inversion algorithm. For this investigation a seismic database with more than twelve-thousand events was built, including all local earthquake data recorded between 1978 and 2001 at all stations of the national and local networks in south Italy. Spread Function computations and checkerboard and restore tests proved higher accuracy of velocity estimates in the upper 40 km beneath Calabrian Arc compared to previous investigations in the same area. The obtained three-dimensional velocity model furnished remarkable improvement of hypocenter locations of the global earthquake dataset (RMS reduction of 38% respect to 1D locations) and greater accuracy in the definition of microplates and tectonic units in the study region. Velocity domains evidenced by our tomography correspond to t...
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