Radon Activity in Volcanic Gases of Mt. Etna by Passive Dosimetry

Radon (222Rn) activity in air was measured for about 6 months at the summit of Mt. Etna Central Crater (Sicily) by integrative radon dosimetry at two different heights above ground level (5 cm and 1 m). This technique for air radon monitoring proved operational in the harsh volcanic environment of M...

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Published in:Journal of Geophysical Research: Solid Earth
Main Authors: Terray, Luca, Gauthier, Pierre‐Jean, Breton, Vincent, Giammanco, Salvatore, Sigmarsson, Olgeir, Salerno, Giuseppe, Caltabiano, Tommaso, Falvard, Alain
Other Authors: Laboratoire Magmas et Volcans, Université Clermont Auvergne, Aubière, France, Laboratoire de Physique de Clermont,Université Clermont Auvergne, Aubière, France, Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione OE, Catania, Italia
Format: Article in Journal/Newspaper
Language:English
Published: Wiley Agu 2020
Subjects:
04.08. Volcanology
Antarctica Journal
Online Access:http://hdl.handle.net/2122/14176
https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2019JB019149
https://doi.org/10.1029/2019JB019149
id ftingv:oai:www.earth-prints.org:2122/14176
record_format openpolar
institution Open Polar
collection Earth-Prints (Istituto Nazionale di Geofisica e Vulcanologia)
op_collection_id ftingv
language English
topic 04.08. Volcanology
spellingShingle 04.08. Volcanology
Terray, Luca
Gauthier, Pierre‐Jean
Breton, Vincent
Giammanco, Salvatore
Sigmarsson, Olgeir
Salerno, Giuseppe
Caltabiano, Tommaso
Falvard, Alain
Radon Activity in Volcanic Gases of Mt. Etna by Passive Dosimetry
topic_facet 04.08. Volcanology
description Radon (222Rn) activity in air was measured for about 6 months at the summit of Mt. Etna Central Crater (Sicily) by integrative radon dosimetry at two different heights above ground level (5 cm and 1 m). This technique for air radon monitoring proved operational in the harsh volcanic environment of Mt. Etna summit with a 94% recovery rate of dosimeters. In the southeast sector exposed to the main gas plume, mean radon activity in free air (height 1 m) is significantly higher than the local background and the ground level activity (height 5 cm). The results strongly suggest that the plume is enriched in radon by ≈550 Bq/m3, which has never been evidenced before. Radon activities also reflect soil degassing occurring in the proximity of the crater, with increased ground level activities in zones of enhanced soil fracturing and degassing. Radon measurements also revealed a hot spot in front of the Voragine vent with extraordinary high levels of air activities (26 kBq/m3 at ground level and 8 kBq/m3 in free air). The temporal variation of radon activity was investigated by replacing a few stations half way through the exposure period. The only significant increase was associated with the site located under the main gas plume and correlated with eruptive unrest within the crater. Finally, air radon levels higher than the recommended threshold of 300 Bq/m3 were detected in several zones on the rim and could generate a nonnegligible radiologic dose for workers on the volcano. Published e2019JB019149 3V. Proprietà chimico-fisiche dei magmi e dei prodotti vulcanici JCR Journal
author2 Laboratoire Magmas et Volcans, Université Clermont Auvergne, Aubière, France
Laboratoire de Physique de Clermont,Université Clermont Auvergne, Aubière, France
Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione OE, Catania, Italia
format Article in Journal/Newspaper
author Terray, Luca
Gauthier, Pierre‐Jean
Breton, Vincent
Giammanco, Salvatore
Sigmarsson, Olgeir
Salerno, Giuseppe
Caltabiano, Tommaso
Falvard, Alain
author_facet Terray, Luca
Gauthier, Pierre‐Jean
Breton, Vincent
Giammanco, Salvatore
Sigmarsson, Olgeir
Salerno, Giuseppe
Caltabiano, Tommaso
Falvard, Alain
author_sort Terray, Luca
title Radon Activity in Volcanic Gases of Mt. Etna by Passive Dosimetry
title_short Radon Activity in Volcanic Gases of Mt. Etna by Passive Dosimetry
title_full Radon Activity in Volcanic Gases of Mt. Etna by Passive Dosimetry
title_fullStr Radon Activity in Volcanic Gases of Mt. Etna by Passive Dosimetry
title_full_unstemmed Radon Activity in Volcanic Gases of Mt. Etna by Passive Dosimetry
title_sort radon activity in volcanic gases of mt. etna by passive dosimetry
publisher Wiley Agu
publishDate 2020
url http://hdl.handle.net/2122/14176
https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2019JB019149
https://doi.org/10.1029/2019JB019149
genre Antarctica Journal
genre_facet Antarctica Journal
op_relation Journal of Geophysical Research - Solid Earth
9/125 (2020)
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spelling ftingv:oai:www.earth-prints.org:2122/14176 2023-05-15T14:14:54+02:00 Radon Activity in Volcanic Gases of Mt. Etna by Passive Dosimetry Terray, Luca Gauthier, Pierre‐Jean Breton, Vincent Giammanco, Salvatore Sigmarsson, Olgeir Salerno, Giuseppe Caltabiano, Tommaso Falvard, Alain Laboratoire Magmas et Volcans, Université Clermont Auvergne, Aubière, France Laboratoire de Physique de Clermont,Université Clermont Auvergne, Aubière, France Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione OE, Catania, Italia 2020-09 http://hdl.handle.net/2122/14176 https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2019JB019149 https://doi.org/10.1029/2019JB019149 en eng Wiley Agu Journal of Geophysical Research - Solid Earth 9/125 (2020) Aiuppa, A., Giudice, G., Gurrieri, S., Liuzzo, M., Burton, M., Caltabiano, T., et al. (2008). Total volatile flux from Mount Etna. Geophysical Research Letters, 35, L24302. https://doi.org/10.1029/2008GL035871 Allard, P., Aiuppa, A., Bani, P., Métrich, N., Bertagnini, A., Gauthier, P.‐J., et al. (2016). Prodigious emission rates and magma degassing budget of major, trace and radioactive volatile species from Ambrym basaltic volcano, Vanuatu island Arc. Journal of Volcanology and Geothermal Research, Understanding volcanoes in the Vanuatu arc, 322, 119–143. https://doi.org/10.1016/j.jvolgeores.2015.10.004 Allard, P., Behncke, B., D'Amico, S., Neri, M., & Gambino, S. (2006). Mount Etna 1993–2005: Anatomy of an evolving eruptive cycle. Earth‐ Science Reviews, 78(1–2), 85–114. https://doi.org/10.1016/j.earscirev.2006.04.002 Andres, R., Rose, W., Stoiber, R., Williams, S., Matías, O., & Morales, R. (1993). A summary of sulfur dioxide emission rate measurements from Guatemalan volcanoes. Bulletin of Volcanology, 55(5), 379–388. https://doi.org/10.1007/BF00301150 Berlo, K., Turner, S., Blundy, J., Black, S., & Hawkesworth, C. (2006). Tracing pre‐eruptive magma degassing using (210Pb/226Ra) disequilibria in the volcanic deposits of the 1980–1986 eruption of Mount St. Helens. Earth and Planetary Science Letters, 249(3–4), 337–349. https://doi.org/10.1016/j.epsl.2006.07.018 Bonaccorso, A., Calvari, S., Coltelli, M., Del Negro, C., & Falsaperla, S. (2004). Mt. Etna: Volcano Laboratory (p. 143). Washington DC: American Geophysical Union Geophysical Monograph Series. Chirkov, A. M. (1975). Radon as a possible criterion for predicting eruptions as observed at Karymsky volcano. Bulletin of Volcanology, 39(1), 126–131. https://doi.org/10.1007/BF02596952 Cigolini, C., Laiolo, M., Coppola, D., Trovato, C., & Borgogno, G. (2016). Radon surveys and monitoring at active volcanoes: Learning from Vesuvius, Stromboli, La Soufrière and Villarrica. 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Proceedings of the National Academy of Sciences, 104(38), 14,889–14,894. https://doi.org/10.1073/pnas.0701020104 0148-0227 http://hdl.handle.net/2122/14176 https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2019JB019149 doi:10.1029/2019JB019149 open 04.08. Volcanology article 2020 ftingv https://doi.org/10.1029/2019JB019149 https://doi.org/10.1029/2008GL035871 2022-07-29T06:08:19Z Radon (222Rn) activity in air was measured for about 6 months at the summit of Mt. Etna Central Crater (Sicily) by integrative radon dosimetry at two different heights above ground level (5 cm and 1 m). This technique for air radon monitoring proved operational in the harsh volcanic environment of Mt. Etna summit with a 94% recovery rate of dosimeters. In the southeast sector exposed to the main gas plume, mean radon activity in free air (height 1 m) is significantly higher than the local background and the ground level activity (height 5 cm). The results strongly suggest that the plume is enriched in radon by ≈550 Bq/m3, which has never been evidenced before. Radon activities also reflect soil degassing occurring in the proximity of the crater, with increased ground level activities in zones of enhanced soil fracturing and degassing. Radon measurements also revealed a hot spot in front of the Voragine vent with extraordinary high levels of air activities (26 kBq/m3 at ground level and 8 kBq/m3 in free air). The temporal variation of radon activity was investigated by replacing a few stations half way through the exposure period. The only significant increase was associated with the site located under the main gas plume and correlated with eruptive unrest within the crater. Finally, air radon levels higher than the recommended threshold of 300 Bq/m3 were detected in several zones on the rim and could generate a nonnegligible radiologic dose for workers on the volcano. Published e2019JB019149 3V. Proprietà chimico-fisiche dei magmi e dei prodotti vulcanici JCR Journal Article in Journal/Newspaper Antarctica Journal Earth-Prints (Istituto Nazionale di Geofisica e Vulcanologia) Journal of Geophysical Research: Solid Earth 125 9

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