Seismically induced variations in Mariánské Lázně fault gas composition in the NW Bohemian swarm quake region, Czech Republic — A continuous gas monitoring

Weinlich, F. H.; Faber, Eckhard; Boušková, Alena; Horálek, Josef; Teschner, Manfred; Poggenburg, J.

doi:10.1016/j.tecto.2006.04.012

Cited by 74 publications

(78 citation statements)

References 55 publications

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“…It can be inferred that the long-period radon concentration is governed by the rock temperature due to thermal expansion of the pores, interstices, cracks of the rock (e.g. Weinlich et al, 2006;Kawada et al, 2007;Vaupoti c et al, 2010) and by the long-term atmospheric loading (Holub and Brady, 1981), especially by weather fronts deforming the rock and pressing the radon into the air (e.g. William and Wilkening, 1974;Crockett et al, 2006).…”

Section: Resultsmentioning

confidence: 99%

Investigation of temperature and barometric pressure variation effects on radon concentration in the Sopronbánfalva Geodynamic Observatory, Hungary

Mentes

Eper-Pápai

2015

Journal of Environmental Radioactivity

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Radon concentration variation has been monitored since 2009 in the artificial gallery of the Sopronbánfalva Geodynamic Observatory, Hungary. In the observatory, the radon concentration is extremely high, 100 -600 kBq m-3 in summer and some kBq m-3 in winter. The relationships between radon concentration, temperature and barometric pressure were separately investigated in the summer and winter months by Fast Fourier Transform, Principal Component Analysis, Multivariable Regression and Partial Least Square analyses in different frequency bands. It was revealed that the long-period radon concentration variation is mainly governed by the temperature (20 kBq m-1 °C-1) both in summer and winter. The regression coefficients between long-period radon concentration and barometric pressure are -1.5 KBq m-3 hPa-1 in the summer and 5 KBq m-3 hPa-1 in the winter months. In the 0.072-0.48 cpd frequency band the effect of the temperature is about -1 kBq m-3 °C-1 and that of the barometric pressure is -5 KBq m-3 hPa-1 in summer and -0.5 KBq m-3 hPa-1 in winter. In the high frequency range (> 0.48 cpd) all regression coefficients are one order of magnitude smaller than in the range of 0.072-0.48 cpd. Fast Fourier Transform of the radon concentration, temperature and barometric pressure time series revealed S1, K1, P1, S2, K2, M2 tidal constituents in the data and week O1 components in the radon concentration and barometric pressure series. A detailed tidal analysis, however, showed that the radon tidal components are not directly driven by the gravitational force but rather by solar radiation and barometric tide. Principal Component Analysis of the raw data was performed to investigate the yearly, summer and winter variability of the radon concentration, temperature and barometric pressure. In the summer and winter periods the variability does not change. The higher variability of the radon concentration compared to the variability of the temperature and the barometric pressure shows that besides the temperature and barometric pressure variations other agents, e.g. natural ventilation of the observatory, wind, etc. also play an important role in the radon concentration variation. Sopronbánfalva Geodynamic Observatory, Hungary. In the observatory, the radon 7 concentration is extremely high, 100 -600 kBq m -3 in summer and some kBq m -3 in winter. 8The relationships between radon concentration, temperature and barometric pressure were

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Section: Resultsmentioning

confidence: 99%

Investigation of temperature and barometric pressure variation effects on radon concentration in the Sopronbánfalva Geodynamic Observatory, Hungary

Mentes

Eper-Pápai

2015

Journal of Environmental Radioactivity

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“…In the domain of the Eger volcano-tectonic zone volcanism had decreased during the middle Miocene (16-12 Ma) but intensified again during the late Miocene and Pliocene (11.4-3.95 Ma) and lingered on to 0.11 Ma (Adamovic and Coubal, 1999;Ulrych et al, 1999;Weinlich et al, 2006). In the Eger Graben, uplift and minor extension resumed after the deposition of Pliocene fluvial clastics (Malkovsky, 1979).…”

Section: Bohemian Massifmentioning

confidence: 99%

Cenozoic uplift of Variscan Massifs in the Alpine foreland: Timing and controlling mechanisms

Ziegler

Dèzes

2007

Global and Planetary Change

198

151

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“…However, other studies (Aumento, 2002;Groves-Kirby et al, 2006;Crocket et al, 2006;Weinlich et al, 2006) indicate that a consistent meteorological influence cannot be identified as giving rise to variability in radon time series, and suggest gravitational tides as an influencing factor on radon variability, since both earth tides and ocean tidal loading may drive periodic radon exhalation via crustal expansion/compression and geophysically driven groundwater level variations.…”

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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Seismically induced variations in Mariánské Lázně fault gas composition in the NW Bohemian swarm quake region, Czech Republic — A continuous gas monitoring

Cited by 74 publications

References 55 publications

Investigation of temperature and barometric pressure variation effects on radon concentration in the Sopronbánfalva Geodynamic Observatory, Hungary

Investigation of temperature and barometric pressure variation effects on radon concentration in the Sopronbánfalva Geodynamic Observatory, Hungary

Cenozoic uplift of Variscan Massifs in the Alpine foreland: Timing and controlling mechanisms

Radon signals at the Roded site, Southern Israel

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