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Título

Processing of radon time series in underground environments: Implications for volcanic surveillance in the island of Tenerife, Canary Islands, Spain

AutorViñas, Ronaldo; Eff-Darwich, Antonio; Soler, Vicente ; Martín-Luis, María C.; Quesada, María L.; Nuez, Julio de la
Palabras claveRadon
Volcanic activity
Time series
Underground
Tenerife
Canary Islands
Fecha de publicaciónene-2007
EditorElsevier
CitaciónRadiation Measurements 42(1): 101-115 (2007)
ResumenThe analysis of temporal and spatial variations in the flux of soil gases across the soil–air interface is a useful tool to study geo-dynamical processes associated with volcanic and/or seismic activity. However, many of these variations are induced by external variables, such as temperature, barometric pressure, rainfall and other meteorological variables. In an attempt to filter out non-endogenous variations in the emissions of gases, the optimal choice of the monitoring sites with numerical filtering techniques based on multi-variate and frequency domain analysis of the time series for gaseous emissions were combined, in the case of radon (Rn-222). Monitoring sites are located in underground galleries in the volcanic island of Tenerife, Canary Islands, Spain. Since the effect of wind, rainfall and temperature variations are very small inside galleries, a first natural filtering process of external parameters in the emissions of gases was achieved. This new approach has been successfully tested and as a result, the background level for radon emissions at various locations has been defined, by which correlations between gaseous emissions and the volcanic and/or seismic activity could be carried out.
Descripción15 pages, 12 figures, 3 tables.-- Available online Oct 12, 2006.
Versión del editorhttp://dx.doi.org/10.1016/j.radmeas.2006.07.002
URIhttp://hdl.handle.net/10261/12686
DOI10.1016/j.radmeas.2006.07.002
ISSN1350-4487
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