Northampton Electronic Collection of Theses and Research

Standardised Radon Index (SRI): a normalisation of radon data-sets in terms of standard normal variables

Crockett, R. G. M. and Holt, C. P. (2011) Standardised Radon Index (SRI): a normalisation of radon data-sets in terms of standard normal variables. Natural Hazards and Earth System Science. 11(7), pp. 1839-1844. 1684-9981.

Item Type: Article
Abstract: During the second half of 2002, from late June to mid December, the University of Northampton Radon Research Group operated two continuous hourly-sampling radon detectors 2.25km apart in the English East Midlands. This period included the Dudley earthquake (ML = 5, 22 September 2002) and also a smaller earthquake in the English Channel (ML = 3, 26 August 2002). Rolling/sliding windowed cross-correlation of the paired radon time-series revealed periods of simultaneous similar radon anomalies which occurred at the time of these earthquakes but at no other times during the overall radon monitoring period. Stan- dardising the radon data in terms of probability of magnitude, analogous to the Standardised Precipitation Indices (SPIs) used in drought modelling, which effectively equalises dif- ferent non-linear responses, reveals that the dissimilar rela- tive magnitudes of the anomalies are in fact closely equiprob- abilistic. Such methods could help in identifying anomalous signals in radon – and other – time-series and in evaluating their statistical significance in terms of earthquake precur- sory behaviour.
Subjects: G Geography. Anthropology. Recreation > GE Environmental Sciences > GE300 Environmental management
T Technology > TD Environmental technology. Sanitary engineering > TD885.5 Radon pollution
Q Science > QE Geology > QE500 Dynamic and structural geology > QE521 Volcanoes and earthquakes
Creators: Crockett, Robin G M and Holt, Chris P
Publisher: EGU / Copernicus
Northamptonshire and East Midlands: Environment
Faculties, Divisions and Institutes: Faculties > Faculty of Arts, Science & Technology > Environmental Science
Date: 5 July 2011
Date Type: Publication
Page Range: pp. 1839-1844
Journal or Publication Title: Natural Hazards and Earth System Science
Volume: 11
Number: 7
Language: English
ISSN: 1684-9981
Status: Published / Disseminated
Refereed: Yes

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