Short and long term radon in soil monitoring for geophysical purposes

Segovia, N.; Mena, M.; Seidel, J.L.; Monnin, M.; Tamez, Elsa; Peña, P.

doi:10.1016/1350-4487(95)00181-d

Cited by 27 publications

(11 citation statements)

References 5 publications

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“…The proposition that 222 Rn may serve as a useful proxy for seismic activity has been repeatedly raised (e.g. Monnin and Seidel, 1992;Segovia et al, 1995;Toutain and Baubron, 1999;Hartmann and Levy, 2006 and references therein). Trique et al (1999), using measurements in a tunnel within massive gneiss, associated multiday 222 Rn bursts with transient deformation due to loading and unloading of a local water reservoir.…”

Section: Introductionmentioning

confidence: 99%

Possible effect of solar tides on radon signals

Steinitz¹,

Piatibratova²,

Kotlarsky³

2011

Journal of Environmental Radioactivity

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Section: Introductionmentioning

confidence: 99%

Possible effect of solar tides on radon signals

Steinitz¹,

Piatibratova²,

Kotlarsky³

2011

Journal of Environmental Radioactivity

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“…Its noble gas character and its radioactive decay make it a unique ultra‐trace component for tracking natural processes in subsurface systems. The proposition that radon may serve as a useful proxy for seismic activity has been repeatedly considered [e.g., Monin and Seidel , 1992; Segovia et al , 1995; Toutain and Baubron , 1999; Reddy et al , 2004; Hartmann and Levy , 2005 and references therein]. In parallel, transport of radon in soil and water has been investigated as a tool for monitoring volcanic activity [e.g., Cigolini et al , 2001; Burton et al , 2004; Alparone et al , 2005; Immè et al , 2006].…”

Section: Introductionmentioning

confidence: 99%

Radon daily signals in the Elat Granite, southern Arava, Israel

Steinitz¹,

Piatibratova²,

Barbosa³

2007

J. Geophys. Res.

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[1] High time resolution monitoring of radon (= 222 Rn) in three boreholes, 4, 10 and 53 m deep, along a 0.6 km transect is carried out in massive granite in southern Israel. Three components of variation occur in the measured signal (MS) -seasonal radon (SR -periodic), multiday (MD), and daily radon (DR -periodic). Temporal variation of the components suggests an association between the overall level of the long-term variation and the amplitude of the daily variation. The daily mean level of radon and the daily standard deviation vary periodically throughout the year. Time offsets occur among time series of the MS and were investigated also for the MD and DR components, using consecutive 20-day intervals spanning +900 days. The resulting time series show that systematic time offsets occur, whereby the radon signal always occurs first at the easternmost site. The MD shows a gradually varying lag of 0-12 h, and the DR a stable 1-3 h lag. Spectral analysis shows that diurnal (24-h) and semidiurnal (12-h) periodic components characterize the DR. The amplitudes of these components exhibit regular temporal variation having a seasonal pattern. The ratios of co-occurring amplitudes of these components define a linear pattern indicating a fundamental statistical property in the frequency domain of the radon time series. The results indicate that unrecognized dynamic processes are driving the radon signal in the subsurface regime of the pluton, suggesting new prospects for radon behavior in the frame of interacting geodynamic (tectonic?) and Earth-Sun system related processes.

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“…The proposition that radon may serve as a useful proxy for seismic activity has been repeatedly raised (e.g. Monin and Seidel, 1992;Segovia et al, 1995;Toutain and Baubron, 1999;Hartmann and Levi, 2005, and references therein). Trique et al (1999), using measurements in a tunnel within massive gneiss, associated multiday Rn bursts with transient deformation due to loading and unloading of a local water reservoir.…”

Section: Introductionmentioning

confidence: 99%

Radon signals at the Roded site, Southern Israel

Steinitz

Piatibratova

2010

Solid Earth

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Abstract. Temporal variations of radon in the geological environment (upper crust) are frequent and recognized as unique in terms of the signals encountered and for the lack of substantial and generally applicable explanations. The phenomena observed at the Roded site, located in arid southern Israel, illustrate this situation. The monitoring of radon in the last 10 years or more has been carried out in massive meta-diorite of the Precambrian basement block of Roded. The measurement is conducted using an alpha detector at a resolution of 15-min, placed in a borehole at a depth of 9 m, within a PVC casing to that depth. Systematic temporal variation patterns, manifested as large relative signals are composed of sub-diurnal (SDR) radon, multi-day (MD) and annual (AR) signals. The overall variation is dominated by the intense SDR signals which occur in some days, and may vary from background levels (5 counts or less) to peak values (attaining > 1000 counts) and back to background at an interval of 6 to 12 h. Intervals of up to several tens of days without significant SDR signals interchange with times of intense daily occurrences of such signals. Their occurrence indicates very fast variations of radiation from radon at the point of measurement. The peak times, within the diurnal 24-h cycle of SDR signals occur preferentially at an interval of 14-16 h (UT+2). Spectral analysis indicates: (a) A diurnal periodicity composed of a primary 24-h and a secondary 12-h periodicity, which are attributed to the solar tide constituents S1 and S2. Tidal constituents indicative for gravity tide (O1, M2) are lacking; (b) An annual periodicity. A compound relation among the diurnal and annual periodicity is indicated by: (a) Continuous Wavelet Transform (CWT) analysis shows an overall annual structure with a modulation of the S1 and S2 periodicities; (b) Moving-time-window Fourier spectral analysis showing that the amplitudes of S1Correspondence to: G. Steinitz (steinitz@gsi.gov.il) and S2 vary in an annual pattern, with relatively high values in summer. The phase of S1, S2 and S3 shows a systematic multi-year variation. It is suggested that the significant signatures of the periodic phenomena and their modulations reflect a direct link with the solar radiation tide.

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Short and long term radon in soil monitoring for geophysical purposes

Cited by 27 publications

References 5 publications

Possible effect of solar tides on radon signals

Possible effect of solar tides on radon signals

Radon daily signals in the Elat Granite, southern Arava, Israel

Radon signals at the Roded site, Southern Israel

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