Multivariate approach to evaluate the relationship among geophysical and geochemical variables during an unrest period at Campi Flegrei caldera (Italy)

Sergio Scippacercola (), Zaccaria Petrillo (), Annarita Mangiacapra () and Stefano Caliro ()
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Sergio Scippacercola: Università degli Studi di Napoli “Federico II”
Zaccaria Petrillo: Istituto Nazionale di Geofisica e Vulcanologia
Annarita Mangiacapra: Istituto Nazionale di Geofisica e Vulcanologia
Stefano Caliro: Istituto Nazionale di Geofisica e Vulcanologia

Quality & Quantity: International Journal of Methodology, 2019, vol. 53, issue 5, No 14, 2473-2489

Abstract: Abstract Campi Flegrei is a caldera in Southern Italy, which has manifested signs of significant unrest in the last years. Indeed, during volcanic crises, the ground of Campi Flegrei caldera begin to grow steadily, the earthquake swarms become more common and strong variations in the chemical composition of fumaroles are observed. In the Campi Flegrei volcanic area there is a spread ground deformation monitoring network. In the years 1983–1985 the bradiseism showed an increasing trend of ground uplift with a fairly fast velocity. In the following years (1986–2014) the phenomenon tends to decrease: the earthquakes number is near to zero, the vertical ground displacement decreases, the fumaroles modify the gas emissions, the soil temperature decreases. The main object of this study is to evaluate, by means of variables comparison, in a counterclockwise periods, the relationship among geochemical data of fumaroles, earthquakes and ground deformations, to discover which variables can be considered signals (geochemical indicator) of the bradyseismic events during an unrest period.

Keywords: Geochemical variables; Earthquakes; Ground deformation; Bradyseism; Volcanic risk; Multivariate analysis (search for similar items in EconPapers)
Date: 2019
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DOI: 10.1007/s11135-018-0769-7

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