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| Titel |
Standardised Radon Index (SRI): a normalisation of radon data-sets in terms of standard normal variables |
| VerfasserIn |
R. G. M. Crockett, C. P. Holt |
| 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 ; 11, no. 7 ; Nr. 11, no. 7 (2011-07-05), S.1839-1844 |
| Datensatznummer |
250009554
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| Publikation (Nr.) |
 copernicus.org/nhess-11-1839-2011.pdf |
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| Zusammenfassung |
| 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 2.25 km 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. Standardising the radon data in terms of
probability of magnitude, analogous to the Standardised Precipitation
Indices (SPIs) used in drought modelling, which effectively equalises
different non-linear responses, reveals that the dissimilar relative
magnitudes of the anomalies are in fact closely equiprobabilistic. Such
methods could help in identifying anomalous signals in radon – and other –
time-series and in evaluating their statistical significance in terms of
earthquake precursory behaviour. |
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