Spectral-decomposition techniques for the identification of radon anomalies temporally associated with earthquakes occurring in the UK in 2002 and 2008

Crockett, R. G. M. and Gillmore, G. K. (2010) Spectral-decomposition techniques for the identification of radon anomalies temporally associated with earthquakes occurring in the UK in 2002 and 2008. Natural Hazards and Earth System Sciences. 10(6), pp. 1079-1084. 1561-8633.

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Item Type:	Article
Abstract:	During the second half of 2002, the University of Northampton Radon Research Group operated two continuous hourly-sampling radon detectors 2.25 km apart in the English East Midlands. This period included the Dudley earthquake (ML=5, 22 September 2002). Also, at various periods during 2008 the Group has operated other pairs of continuous hourly-sampling radon detectors similar distances apart in the same region. One such period included the Market Rasen earthquake (ML=5.2, 27 February 2008). Windowed cross-correlation of the paired time-series was used to identify simultaneous short-duration anomalies. In the 2002 data, only two periods of significant cross-correlation were observed, each corresponding temporally to a UK earthquake, one to the Dudley earthquake and the other to a smaller earthquake in the English Channel (ML=3, 26 August 2002). In the 2008 data, cross-correlation initially revealed little evidence of simultaneous short-duration anomalies but cross-correlation of data de-noised and de-trended using Empirical Mode Decomposition (EMD) revealed clear simultaneous short-duration anomalies which correspond temporally to the Market Rasen earthquake
Subjects:	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 Gillmore, Gavin K
Publisher:	European Geosciences Union
Faculties, Divisions and Institutes:	Faculties > Faculty of Arts, Science & Technology > Environmental Science
Date:	2010
Date Type:	Publication
Page Range:	pp. 1079-1084
Journal or Publication Title:	Natural Hazards and Earth System Sciences
Volume:	10
Number:	6
Language:	English
DOI:	https://doi.org/10.5194/nhess-10-1079-2010
ISSN:	1561-8633
Status:	Published / Disseminated
Refereed:	Yes
URI:	http://nectar.northampton.ac.uk/id/eprint/3203

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