Analysis of radon time series recorded in Slovak and Czech caves for the detection of anomalies due to seismic phenomena

0532705 - ÚSMH 2021 RIV GB eng J - Journal Article
Ambrosino, F. - Thinová, L. - Briestenský, Miloš - Sabbarese, C.
Analysis of radon time series recorded in Slovak and Czech caves for the detection of anomalies due to seismic phenomena.
Radiation Protection Dosimetry. Roč. 186, 2/3 (2019), s. 428-432. ISSN 0144-8420. E-ISSN 1742-3406
R&D Projects: GA MŠMT(CZ) LM2015079
Institutional support: RVO:67985891
Keywords : radon * seasonal fluctuation * anomalies * hybrid method * pre-seismic * forecasting
OECD category: Inorganic and nuclear chemistry
Impact factor: 0.773, year: 2019
Method of publishing: Limited access
https://academic.oup.com/rpd/article-abstract/186/2-3/428/5674025?redirectedFrom=fulltext

Anomalies in the radon (Rn-222) releases in underground environments are one of the phenomena that can be observed before earthquake occurrence. Continuous measurements of radon activity concentration, and of meteorological parameters that influence the gas emission, were performed in three Slovak and Czech caves during 1-y period (1 July 2016-30 June 2017). The radon activity concentration in caves shows seasonal variations, with maxima reached during summer months. The anomalies in the radon time series are identified using a combination of three mathematical methods: multiple linear regression, empirical mode decomposition and support vector regression. The radon anomaly periods were compared with earthquake occurrences in Europe. Coincidences between both phenomena were found, since all monitored caves reflect contemporaneous local tectonic changes. The results indicate that radon continuous monitoring could assist a better understanding of radon emissions, along active tectonic structures, during seismic events.
Permanent Link: http://hdl.handle.net/11104/0311130