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

机译:标准化Rad指数(SRI):根据标准正态变量对ra数据集进行归一化

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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 (M_L = 5, 22 September 2002) and also a smaller earthquake in the English Channel (M_L = 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.
机译:在2002年下半年,即6月下旬至12月中旬,北安普顿大学Rad研究小组在英格兰东米德兰兹郡运行了两个连续的每小时采样ra探测器,相距2.25公里。这个时期包括达德利地震(M_L = 5,2002年9月22日)和英吉利海峡较小的地震(M_L = 3,2002年8月26日)。配对ra时间序列的滚动/滑动窗口互相关揭示了在这些地震发生时同时发生的similar相似异常时期,但在整个ra监测期间没有其他时间。根据幅度概率对数据进行标准化,类似于干旱建模中使用的标准化降水指数(SPI),它可以有效地使不同的非线性响应相等,这表明异常的不同相对幅度实际上几乎是等概率的。这样的方法可以帮助识别ra和其他时间序列中的异常信号,并根据地震前兆行为评估其统计意义。

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