Seismological monitoring of the February 2007 effusive eruption of the Stromboli volcano

On February 27, 2007, the Stromboli volcano, which has usually been characterized by moderate explosive activity, started an effusive eruption with a small lava flow down the NW flank. The permanent broadband network installed on the island allowed the revealing of anomalies in the seismicity before the effusive eruption and for the phenomena to be followed over time, thus obtaining meaningful information about the eruption dynamics. During the effusive phase, a major explosion occurred on March 15, 2007. On that occasion, two strainmeters deployed on the volcano in the previous year recorded a strain increment before the blast. After this explosion, which further destabilized the upper part of the edifice, swarms of Long-Period (LP) and hybrid events were recorded. The characteristics and locations of these events suggest that they were associated with the fracturing processes that affected the summit area of the cone. During the effusive phase, changes in the Very Long Period (VLP) event location were recorded. This type of events accompanied the change in the eruptive style, providing information about the magmatic conduit involved in their seismogenetic processes. The effusive phase stopped on April 2, 2007, and the typical Strombolian activity restarted some months later

Seismological monitoring of the February 2007 effusive eruption of the Stromboli volcano

On February 27, 2007, the Stromboli volcano, which has usually been characterized by moderate explosive activity, started an effusive eruption with a small lava flow down the NW flank. The permanent broadband network installed on the island allowed the revealing of anomalies in the seismicity before the effusive eruption and for the phenomena to be followed over time, thus obtaining meaningful information about the eruption dynamics. During the effusive phase, a major explosion occurred on March 15, 2007. On that occasion, two strainmeters deployed on the volcano in the previous year recorded a strain increment before the blast. After this explosion, which further destabilized the upper part of the edifice, swarms of Long-Period (LP) and hybrid events were recorded. The characteristics and locations of these events suggest that they were associated with the fracturing processes that affected the summit area of the cone. During the effusive phase, changes in the Very Long Period (VLP) event location were recorded. This type of events accompanied the change in the eruptive style, providing information about the magmatic conduit involved in their seismogenetic processes. The effusive phase stopped on April 2, 2007, and the typical Strombolian activity restarted some months later

Inspection of architectural structures with integrated electrical methodologies and infrared thermography

The attention of this paper was focused on the detection of moisture and local inhomogeneities inside architectural structures with electrical methodologies and infrared thermography. To this end, a suitable specimen was fabricated using a mixture of sand, water and concrete and with slag inclusions. To monitor the moisture variation with time in concrete, nondestructive evaluation with both the techniques was made three months after the specimen fabrication and repeated again six months later

Inspection of architectural structures with integrated electrical methodologies and infrared thermography

Inspection of architectural structures with integrated electrical methodologies and infrared thermograph

Metodologie geofisiche e termografiche per la salvaguardia di Beni Architettonici

La conservazione del patrimonio architettonico è senza dubbio uno degli obiettivi principali nell’ambito delle problematiche relative ai Beni Culturali. L'uso di metodologie non-distruttive di tipo geofisico e termografico, viene qui illustrato, attraverso la presentazione di un case-history, quale contributo innovativo per la valutazione di dettaglio del degrado di edifici storici e monumenti, al fine di fornire indirizzi di intervento per la tutela degli stessi. In questa nota, dopo una breve sintesi introduttiva dedicata alla definizione dello schema scientifico-tecnico alla base delle metodologie trattate, vengono mostrati i risultati di un'interpretazione integrata di dati geofisici e termografici relativi a misure di laboratorio eseguite su campioni simulanti strutture murarie disomogenee sia da un punto di vista fisico che strutturale

The contribution of electrical resistivity measurements to the analysis of landslide events

In order to gain insight into the study of natural avalanches dynamics, we illustrate a statistical model based on a dissipative dynamical variable associated to a position dependent factor of safety field. This model, as experimentally demonstrated, is able to reproduce the complex structure of landslide events, such as power-law distributions. In this paper, we introduce an explicit dependence of the safety factor on the electrical resistivity to simulate landslide events in pyroclastic soils. An application of the model to data acquired in a test area characterized by flowslide events (Monte Albino, Campania Region - South Italy) bear witness the relevant role played by the resistivity measurements in the landslide hazard assessment

The contribution of electrical resistivity measurements to the analysis of landslide events

In order to gain insight into the study of natural avalanches dynamics, we illustrate a statistical model based on a dissipative dynamical variable associated to a position dependent factor of safety field. This model, as experimentally demonstrated, is able to reproduce the complex structure of landslide events, such as power-law distributions. In this paper, we introduce an explicit dependence of the safety factor on the electrical resistivity to simulate landslide events in pyroclastic soils. An application of the model to data acquired in a test area characterized by flowslide events (Monte Albino, Campania Region - South Italy) bear witness the relevant role played by the resistivity measurements in the landslide hazard assessment