Connection between 222Rn emission and geophysical-geochemical parameters recorded during the volcanic unrest at Campi Flegrei caldera (2011-2017)

F Ambrosino; C Sabbarese; V Roca; F Giudicepietro; W De Cesare

doi:10.1016/j.apradiso.2020.109385

Connection between ²²²Rn emission and geophysical-geochemical parameters recorded during the volcanic unrest at Campi Flegrei caldera (2011-2017)

Appl Radiat Isot. 2020 Dec:166:109385. doi: 10.1016/j.apradiso.2020.109385. Epub 2020 Sep 20.

Authors

F Ambrosino¹, C Sabbarese², V Roca³, F Giudicepietro⁴, W De Cesare⁴

Affiliations

¹ Department of Mathematics and Physics, University of Campania "Luigi Vanvitelli", Viale Lincoln 5, 81100, Caserta, Italy; National Institute for Nuclear Physics (INFN), Branch of Naples, Via Cinthia 21, 80126, Napoli, Italy. Electronic address: fabrizio.ambrosino@unicampania.it.
² Department of Mathematics and Physics, University of Campania "Luigi Vanvitelli", Viale Lincoln 5, 81100, Caserta, Italy; National Institute for Nuclear Physics (INFN), Branch of Naples, Via Cinthia 21, 80126, Napoli, Italy.
³ National Institute for Nuclear Physics (INFN), Branch of Naples, Via Cinthia 21, 80126, Napoli, Italy.
⁴ National Institute of Geophysics and Volcanology (INGV), Naples Branch, Vesuvius Observatory, Via Diocleziano 328, 80124, Napoli, Italy.

PMID: 32979758
DOI: 10.1016/j.apradiso.2020.109385

Abstract

Studies concerning ²²²Rn emission from soils are growing interest in the Earth Sciences, due to the gas potential as a tracer of natural phenomena. This paper presents a study of radon monitoring in two sites of Campi Flegrei caldera (Neaples, Italy) during the period July 1, 2011-December 31, 2017. This area was characterized by several phases of volcanic unrest. A hybrid method based on Multiple Linear Regression + Remote Radon Estimation method + Singular Spectrum Analysis (MLR + RRE + SSA) is developed for the trend extraction and the identification of anomalies in the time series of ²²²Rn. The results are compared with several routinely used geo-indicators of the caldera unrest. The comparisons show strong correlation among the signals. The present study proves the ²²²Rn is a potential indicator of the evolution of a volcanic crisis.

Keywords: CO(2); Campi flegrei; Fumarolic tremor; Radon; Time series analysis; Volcanic unrest.