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| Titel |
Spectral-decomposition techniques for the identification of radon anomalies temporally associated with earthquakes occurring in the UK in 2002 and 2008 |
| VerfasserIn |
R. G. M. Crockett, G. K. Gillmore |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Science ; 10, no. 6 ; Nr. 10, no. 6 (2010-06-01), S.1079-1084 |
| Datensatznummer |
250008218
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| Publikation (Nr.) |
 copernicus.org/nhess-10-1079-2010.pdf |
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| Zusammenfassung |
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. |
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