Anomalous radon emission as precursor of earthquake

Ghosh, Dipak; Deb, Argha; Sengupta, Ranjan

doi:10.1016/j.jappgeo.2009.06.001

Cited by 193 publications

(106 citation statements)

References 114 publications

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“…We synthesized 2-azidoethylamine in 93% yield, also following literature precedent (17). Reaction of 4 with three equivalents of 2-azidoethylamine was achieved via copper(I)-mediated [3 þ 2] Huisgen cycloadditions (18)(19)(20)(21) to give the water-soluble TTEC (6). TTEC was purified by HPLC ( Fig.…”

Section: Resultsmentioning

confidence: 99%

“…In Europe, such a level corresponds to 2% of all cancer deaths (5). The imperative to detect and remediate indoor radon motivates the study of radon chemistry, as do other scientific applications such as radon emission related to seismic activity (6). Prior radon-chemical studies have focused on adsorption of the gas to bulk substrates (7) such as charcoal, silica gel, and ice, and on the formation of radon halides (8).…”

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confidence: 99%

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Measurement of radon and xenon binding to a cryptophane molecular host

Jacobson

Khan²,

Collé³

et al. 2011

Proc. Natl. Acad. Sci. U.S.A.

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Xenon and radon have many similar properties, a difference being that all 35 isotopes of radon ( 195 Rn– 229 Rn) are radioactive. Radon is a pervasive indoor air pollutant believed to cause significant incidence of lung cancer in many geographic regions, yet radon affinity for a discrete molecular species has never been determined. By comparison, the chemistry of xenon has been widely studied and applied in science and technology. Here, both noble gases were found to bind with exceptional affinity to tris-(triazole ethylamine) cryptophane, a previously unsynthesized water-soluble organic host molecule. The cryptophane–xenon association constant, K a = 42,000 ± 2,000 M -1 at 293 K, was determined by isothermal titration calorimetry. This value represents the highest measured xenon affinity for a host molecule. The partitioning of radon between air and aqueous cryptophane solutions of varying concentration was determined radiometrically to give the cryptophane–radon association constant K a = 49,000 ± 12,000 M -1 at 293 K.

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Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

Measurement of radon and xenon binding to a cryptophane molecular host

Jacobson

Khan²,

Collé³

et al. 2011

Proc. Natl. Acad. Sci. U.S.A.

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“…The number of false anomalies for approach (II) points to the disturbance of radon exhalation by other environmental parameters and not just by barometric pressure. The assumption that radon exhalation is only directly influenced by barometric pressure is further suggested by different forms of radon transport at compression and dilatation zones (Ghosh et al, 2009). Promising results are achieved by applying approaches (III) and (IV), which make it possible to simultaneously incorporate all of the available environmental parameters.…”

Section: Resultsmentioning

confidence: 99%

“…However, radon anomalies are not only controlled by seismic activity but also by meteorological parameters like soil moisture, rainfall, temperature and barometric pressure (Ghosh et al, 2009;Stranden et al, 1984). This makes it complicated and, for small earthquakes, often impossible to differentiate between those anomalies caused by seismic events and those caused solely by atmospheric changes.…”

mentioning

confidence: 99%

Radon as an Earthquake Precursor – Methods for Detecting Anomalies

Gregorič¹,

Zmazek²,

Džeroski³

et al. 2012

Earthquake Research and Analysis - Statistical Studies, Observations and Planning

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“…Они, в частности, свиде-тельствуют, что содержание радона в одном водо-источнике с течением времени может меняться в несколько раз. В основном мониторинговые иссле-дования проводятся в связи с поиском предвестни-ков сильных землетрясений [Toutain, Baubron, 1999;Ghosh et al, 2009;Woith, 2015]. Они актуальны и для территории Прибайкалья, характеризующейся сложным тектоническим строением и интенсивной сейсмичностью в связи с развитием Байкальского рифта.…”

Section: закономерности временных вариаций содержания радона в подземunclassified