Acta Geodaetica et Geophysica Hungarica
Volume/Issue:
Volume 45: Issue 4
The enigma of helium
Authors:
H. Chaudhuri Variable Energy Cyclotron Centre 1/AF Bidhannagar Kolkata 700 064 India

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D. Ghose Variable Energy Cyclotron Centre 1/AF Bidhannagar Kolkata 700 064 India

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R. Bhandari Variable Energy Cyclotron Centre 1/AF Bidhannagar Kolkata 700 064 India

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P. Sen Saha Institute of Nuclear Physics 1/AF Bidhannagar Kolkata 700 064 India

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B. Sinha Variable Energy Cyclotron Centre 1/AF Bidhannagar Kolkata 700 064 India

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Pages:
452–470
Online Publication Date:
27 Nov 2010
Publication Date:
01 Dec 2010
Article Category:
Journal Article
DOI:
https://doi.org/10.1556/ageod.45.2010.4.5
Keywords:
earthquake; helium; thermal spring
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Helium was first observed in the sun and subsequently much later on the earth. Starting from the early days of its discovery, helium continues to be entwined with the Indian scientific scenario in more ways than one. The element thus has a special charm and significance to the currently emerging situation where it is applied to solve problems in the exceptionally challenging field of tracing the formation of earthquakes and anticipating its occurrence. The present article delves into some of the broader aspects of the problem through a historical approach. The paper also deals with the statistical analysis of the pre-seismic geochemical (He and 222Rn) anomalies recorded at our existing field site laboratories ahead of some major earthquakes that occurred in and around India. A description of the experimentally recorded geochemical (He, F−, Cl−, SO 4−− , and B) and geophysical (temperature, pH, conductivity) characteristics of some thermal springs of north and north-east India is included. A dedicated mass spectrometer analyzed intensities of 3He and 4He in air sample made in our laboratory and implication of the pre-seismic enhancement of 3He/4He ratios measured in thermal spring gases is briefly discussed.

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Cover Acta Geodaetica et Geophysica Hungarica
Acta Geodaetica et Geophysica Hungarica
Print ISSN:
1217-8977
Online ISSN:
1587-1037

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Acta Geodaetica et Geophysica
Language English
Size B5
Year of
Foundation		 2013
Volumes
per Year		 1
Issues
per Year		 4
Founder Magyar Tudományos Akadémia
Founder's
Address		 H-1051 Budapest, Hungary, Széchenyi István tér 9.
Publisher Akadémiai Kiadó Springer
Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 2213-5812 (Print)
ISSN 2213-5820 (Online)

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