What happens to in-soil Radon activity during a long-lasting eruption? Insights from Etna by multidisciplinary data analysis
- Falsaperla, Susanna
- Neri, Marco
- Di Grazia, Giuseppe
- Langer, Horst
- Spampinato, S.
DOIAbstract
We analyze short- to long-term changes (from days to months) in Radon (Rn) activity measured nearby (<2 km) the eruptive fractures that fed a lava effusion at Mt. Etna, Italy, between 13 May 2008 and 6 July 2009. The N120-1408E eruptive fractures opened between 3050 and 2620 m above sea level before a dike-forming intrusion fed the 14 month-long lava emission. Our high-rate data streams include: Rn, ambient parameters (barometric pressure and soil temperature), and seismic data (earthquakes and volcanic tremor) recorded from January 2008 to July 2009. The analysis highlights repeated episodes of rockfracturing related to seismic swarms, and vigorous gas pulses and peak values in Rn emissions (maximum 4.13105 Bq/m3 on 16 November 20...
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