Source: CNRS INSU
Often measured in fumaroles and volcanic soils, radon – a radioactive gas produced by the decay of uranium – had never been measured in primary volcanic gases because of the difficulty of collecting it and its short half-life. This has now been achieved thanks to the work of researchers from Clermont-Ferrand and Italy. By equipping the summit of Mount Etna for more than five months with a novel device consisting of 70 passive dosimeters, they were able to draw up the first map of radon emanation around the central crater of the Sicilian volcano, the most active in Europe.
The effects on the climate
In addition to the preferential outgassing of radon through the soil in highly hydrothermalised and/or fractured areas, their study shows very high radon enrichments in the summit areas exposed to the prevailing wind, and thus to the gas plume continuously emitted by the active craters. This is the first time that the radon content of primary gases has been determined in this way, revealing radon activities of up to 550 Bq/m3.
Environmental and Health Impact
In addition to the potential environmental and health impact of such natural radioactivity levels, knowledge of radon activities in volcanic gases opens the door to future studies in gas geochemistry. The aim is to better understand the magmatic surface processes prior to eruption, as well as the characteristic time scales of degassing. In addition, this study shows in an unprecedented way that the radon activity in the Etna gas plume is likely to vary according to the eruptive intensity of the volcano. A first step towards using radon measured in the air as an eruption precursor signal?
Radon Activity in Volcanic Gases of Mt. Etna by Passive Dosimetry, J. Geophys. Res. Solid Earth, 125.
Terray L., P.J. Gauthier, V. Breton, S. Giammanco, O. Sigmarsson, G. Salerno, T. Caltabiano et A. Falvard.
https://doi.org/10.1029/2019JB019149
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Anne Fornier2022-01-15 11:03:512022-01-15 17:56:51ACID RAIN AND THE IMPACT ON BIODIVERSITY.
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Anne Fornier2021-12-03 17:09:112021-12-03 18:09:18INTERNATIONAL DIPLOMA COURSE CAPACITY DEVELOPMENT FOR DISASTER RISK REDUCTION
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TOT Barcelona
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Anne Fornier2021-10-19 13:25:372021-10-19 13:42:11THE VIGILANTES OF VOLCANOES, UNIQUE IN THE WORLD, INSTALLED IN BARCELONA
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Anne Fornier2021-10-08 12:26:192021-10-18 13:08:06THE LACK OF DILIGENCE IN LA PALMA, CANARY ISLANDS
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Anne Fornier2021-10-07 14:06:592021-10-08 12:27:30OUR QUESTIONS TO THE CONGRESS OF DEPUTIES OF SPAIN
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Anne Fornier2021-10-06 12:01:202021-10-06 13:48:57THE LA PALMA CATASTROPHE IS NOT A NATURAL DISASTER, IT IS A NATURAL HAZARD
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Anne Fornier2021-10-05 10:01:472021-10-05 16:46:10VOLCANO FOUNDATION IN ABC.ES
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Anne Fornier2021-09-06 15:49:202021-10-05 16:48:52WE ARE ASSOCIATED WITH THE ARMANDO ARMERO FOUNDATION
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Anne Fornier2021-08-23 09:39:582021-10-05 16:49:10A NEW VOLCANO IS EMERGING IN MAYOTTE SINCE MAY 2019
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Anne Fornier2021-08-09 08:00:322021-10-05 16:49:52TOP 5 OF THE CITIES THAT ARE BUILT ON VOLCANOES.
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Anne Fornier2021-07-27 10:00:012021-10-05 16:50:08THE TWO LARGEST VOLCANIC COMPLEXES IN THE WORLD.
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Netflix
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Entreprendre.fr
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Anne Fornier2020-04-06 09:00:172021-09-27 17:19:12VOLCANOLOGY FOR SOCIETY
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Anne Fornier
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Anne Fornier2019-11-18 16:22:482021-09-27 17:19:46INTERVIEW OF ALEXANDRE DEL VALLE TO ANNE FORNIER
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Anne Fornier
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Anne Fornier2019-11-12 15:08:322021-09-27 17:20:09SERIES OF DOCUMENTARIES TO EDUCATE THE WORLD
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Anne Fornier
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Anne Fornier2019-09-09 15:00:002021-09-27 17:20:23INTERVIEW WITH ANNE FORNIER ON JET8
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Anne Fornier
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Anne Fornier2019-09-09 14:24:052021-09-27 17:21:07THE FOUNDATION IN MEXICO
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Anne Fornier
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Anne Fornier2019-08-22 08:32:462021-09-27 17:22:08HOW DOES A VOLCANIC ERUPTION AFFECT YOU?
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Anne Fornier
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Anne Fornier2019-08-06 11:19:122021-09-27 17:22:19WORRYING SITUATION OF THE UBINAS VOLCANO
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Anne Fornier
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Anne Fornier2019-08-05 15:16:332021-09-27 17:22:30THE FOUNDATION IN LE DAUPHINÉ LIBÉRÉ
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Anne Fornier
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Anne Fornier2019-08-05 14:33:232021-09-27 17:22:41THE FOUNDATION AT LESSOR SAVOYARD
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Anne Fornier
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Anne Fornier2019-06-11 15:34:472021-09-27 17:22:58EL TEIDE IS PART OF AN ACTIVE VOLCANIC SYSTEM
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Anne Fornier
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Anne Fornier2019-06-11 08:27:342021-09-27 17:23:10SINABUNG ERUPTS
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Anne Fornier
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Anne Fornier2019-06-04 14:55:072021-09-27 17:23:30YELLOWSTONE ERUPTION COULD CAUSE THE END OF HUMANITY
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Anne Fornier
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Anne Fornier2019-05-27 16:05:142021-09-27 17:23:41WHEN THE EARTH AWAKENS ITS BELT OF FIRE
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Anne Fornier
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Anne Fornier2019-05-07 16:01:022021-09-27 17:23:53THE FOUNDATION on RADIO OLOT
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Anne Fornier
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Anne Fornier2019-05-02 10:51:282021-09-27 17:24:03VOLCANO SCHOOL IN OLOT
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Anne Fornier
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Anne Fornier2019-05-02 08:14:052021-09-27 17:24:18THE FOUNDATION AND VOLCANO SCHOOL AT IBERIAN PRESS
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Anne Fornier
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Anne Fornier2019-05-02 08:00:432021-09-27 17:25:13THE FOUNDATION and VOLCANO SCHOOL AT THE GARROTXI
Iberian Press
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Anne Fornier
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Anne Fornier2019-04-29 12:10:492021-09-27 17:25:54FIRST SCHOOL EXCHANGE ON VOLCANOES AND THEIR HAZARDS
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Anne Fornier
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Anne Fornier2019-04-26 07:52:482021-09-27 17:28:22TE ACERCO A MI VOLCAN
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Anne Fornier
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Anne Fornier2019-04-25 13:31:522021-09-27 17:28:35THE FOUNDATION IN EL PUNT AVUI
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Anne Fornier
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Anne Fornier2019-04-24 14:30:112021-09-27 17:29:57ANNE FORNIER: VOLCANOLOGIST AND WHISTLEBLOWER
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Anne Fornier
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Anne Fornier2019-04-09 08:12:012021-09-27 17:30:07DEADLY LAKES
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Anne Fornier
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Anne Fornier2019-04-04 14:06:182021-09-27 17:30:19THE PARICUTIN VOLCANO. TRAILS AND INTERPRETATION.
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Anne Fornier
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Anne Fornier2019-04-04 14:04:492021-09-27 17:30:31THE SEVEN LUMINARIES. CRATERS BETWEEN VILLAGES.
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Anne Fornier
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Anne Fornier2019-04-04 12:47:462021-09-27 17:30:43INTERNATIONAL NETWORK OF VOLCANO GUIDES
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Anne Fornier
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Anne Fornier2019-04-03 16:24:092021-09-27 17:31:10NATURAL HAZARDS IN GOMA AND THE SURROUNDING VILLAGES
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Anne Fornier
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Anne Fornier2019-04-03 15:48:212021-09-27 17:31:24INFLUENCE OF MOISTURE SOURCE DYNAMICS AND WEATHER PATTERNS IN CENTRAL-EASTERN AFRICA
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Anne Fornier
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Anne Fornier2019-02-19 12:12:172021-09-27 17:32:32VEI HOW DO YOU RATE THE STRENGTH OF AN ERUPTION?
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Anne Fornier
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Anne Fornier2019-02-18 17:07:142021-09-27 17:32:43CAMPI FLEGREI, A TICKING TIME BOMB
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Anne Fornier
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Anne Fornier2019-01-23 11:03:272021-09-27 17:39:35HOW A VOLCANO IS CREATED? THE HISTORY OF PARICUTÍN
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Anne Fornier
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Anne Fornier2019-01-16 10:52:182021-09-27 17:40:55COULD ETNA CAUSE A TSUNAMI?
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Anne Fornier
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Anne Fornier2018-12-20 12:40:492021-09-27 17:48:16THE FERTILITY OF VOLCANOES
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Anne Fornier
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Anne Fornier2018-12-20 11:56:112022-01-19 17:14:13WHAT WE KNOW ABOUT UNDERSEA VOLCANOES
Since 2021 VOLCANO ACTIVE FOUNDATION has been committed to the UN Global Compact corporate responsibility initiative and its principles in the areas of human rights, labour, the environment and anti-corruption.
Risk of Volcano Catastrophe