Search results for "etna"

Il Monte Etna in una macchina dei fuochi del 1693 a Palermo

2012

Fra le celebrazioni dedicate annualmente alla santa protettrice di Palermo, Santa Rosalia, in età barocca, il “festino” del 1693, celebrato pochi mesi dopo il sisma che aveva devastato la Sicilia sud-orientale, spicca per il marcato carattere di eccezionalità che gli si volle attribuire, con l'evidente volontà di esorcizzare l'immane catastrofe che aveva colpito l'isola. Tutti gli apparati furono pensati in relazione al tema dei terremoti. Si scelse in particolare di raffigurare il Monte Etna nella macchina dei fuochi, adottando un modello per nulla inedito; d’altronde il parallelismo fra il vulcano in eruzione e una grande macchina pirotecnica riusciva di immediata comprensione, finendo pe…

Le financement de l'éducation (Dossier)

2014

L'auteur est coordinateur du dossier; International audience; La seconde moitié du vingtième siècle a été marquée, partout dans le monde, par un développement considérable du secteur éducatif. Cette évolution concerne tous les niveaux d'enseignement, du primaire au supérieur, et fait peser une lourde charge sur les budgets nationaux. Tous les pays mettent aujourd'hui en ouvre des réformes spécifiques du financement de l'éducation, afin d'accompagner la croissance des effectifs, d'améliorer les résultats et de s'adapter aux nouvelles exigences de la société. Ce numéro 65 de la Revue internationale d'éducation de Sèvres propose un éclairage sur les politiques menées, durant les dernières déce…

Financement et régulation des systèmes éducatifs : innovations et évolution du rôle de l'État

2014

International audience; La seconde moitié du vingtième siècle a été marquée, partout dans le monde, par un développement considérable du secteur éducatif. Cette évolution concerne tous les niveaux d'enseignement, du primaire au supérieur, et fait peser une lourde charge sur les budgets nationaux. Tous les pays mettent aujourd'hui en ouvre des réformes spécifiques du financement de l'éducation, afin d'accompagner la croissance des effectifs, d'améliorer les résultats et de s'adapter aux nouvelles exigences de la société. Ce numéro 65 de la Revue internationale d'éducation de Sèvres propose un éclairage sur les politiques menées, durant les dernières décennies, pour maintenir ou accroître les…

Periodic volcanic degassing behavior: The Mount Etna example

2013

[1] In contrast to the seismic and infrasonic energy released from quiescent and erupting volcanoes, which have long been known to manifest episodes of highly periodic behavior, the spectral properties of volcanic gas flux time series remain poorly constrained, due to a previous lack of hightemporal resolution gas-sensing techniques. Here we report on SO2 flux measurements, performed on Mount Etna with a novel UV imaging technique of unprecedented sampling frequency (0.5Hz), which reveal, for the first time, a rapid periodic structure in degassing from this target. These gas flux modulations have considerable temporal variability in their characteristics and involve two period bands: 40–250…

Geochemical mapping of magmatic gas-water-rock interactions in the aquifer of Mount Etna volcano

2001

Geogenic element behaviour in soil-rainwater interaction at Mt Etna, Sicily: preliminary results

2008

Active volcanoes emit considerable amounts of contaminants such as As, Se and V. Previous studies have shown that the volcanic activity at Mt Etna (Sicily) has a strong influence on local rainwater compositions. However to date, the behaviour of trace elements in the soils around Mt Etna is poorly understood. 4-hr batch experiments have been performed with 1:5 soil solutions of air-dried soil (fraction <2 mm) and synthetic (acid) rainwater (using either deionized water with a pH of ~6 or a ~500 ppm of sulphuric acid solution with a pH of ~2). In general trace element concentrations are more enriched in soil solutions with low pH (e.g. enrichment factor (EF) acid compared to neutral soil sol…

Coseismic Damage at an Archaeological Site in Sicily, Italy: Evidence of Roman Age Earthquake Surface Faulting

2018

Archaeoseismology can provide a useful chronological tool for constraining earthquakes and documenting significant evidence that would otherwise be lost. In this paper, we report a case of surface faulting on ancient man-made structures belonging to the archaeological site of Santa Venera al Pozzo situated along the eastern flank of Mt. Etna volcano in eastern Sicily (southern Italy), which is affected by well-developed tectonic faults. Geological surveys highlight a set of fractures affecting the archaeological ruins, suggesting the occurrence of a capable fault zone across the area. An integrated geophysical survey was carried out in order to identify the main subsurface tectonic disconti…

GPR investigations at San Nicolò Church: a case-study from the 1669 eruption in the old settlement of Misterbianco (Etna, Sicily)

2023

Misterbianco, located on the southern slope of Mt. Etna (eastern Sicily), was destroyed in the past by two catastrophic events that raised the old town to the ground. The first was the great eruption of 1669, whose lava front buried dozens of villages encountered along its path, entirely destroying the architectural heritage of Etna's southern flank. The second event was the disastrous 1693 Val di Noto earthquake, which caused major destruction throughout south-eastern Sicily, also damaging the few still standing buildings in the town. The GPR survey performed at this site, 350 years after the eruption, allowed a first attempt of planimetric reconstruction of the San Nicolo Church. Starting…

Insights into magma and fluid transfer at Mount Etna by a multiparametric approach: A model of the events leading to the 2011 eruptive cycle

2013

Tidal gravity observations at Mt. Etna and Stromboli: Results concerning the modeled and observed tidal factors

2009

Continuous gravity observations performed in the last few years, both at Mt. Etna and Stromboli, have prompted the need to improve the tidal analysis in order to acquire the best corrected data for the detection of volcano related signals. On Mt. Etna, the sites are very close to each other and the expected tidal factor differences are negligible. It is thus useful to unify the tidal analysis results of the different data sets in a unique tidal model. This tidal model, which can be independently confirmed by a modeling of the tidal parameters based on the elastic response of the Earth to tidal forces and the computation of the ocean tides effects on gravity, is very useful for the precise t…