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On a reported effect in ionospheric TEC around the time of the 6 April 2009 L'Aquila earthquake

机译:在2009年4月6日左右的电离层TEC中的报告效果,L'Aquila地震

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In a report published in Advances in Space Research, Nenovski et al. (2015) analyse ionospheric TEC (total electron content) data from GPS measurements around the time of the 6 April 2009 M-w 6.1 L'Aquila (Italy) earthquake. According to the authors, TEC difference (DTEC) calculated from two GPS (Global Positioning System) receivers in central Italy shows a hump-like shape (an increase followed by a decrease) during the hours just before and shortly after the main shock. They maintain that the hump-like shape is anomalous and may be related to the earthquake. We show that the DTEC increase in the hours before the shock, as well as its subsequent slow decrease, does not have any characteristic that might support a possible relationship with the earthquake. We have also conducted our own independent analysis using the same GPS data analysed by Nenovski et al. (2015). We have found a diurnal variation in DTEC time series that shows hump-like shapes like that reported by Nenovski et al. (2015) throughout the investigated period. This demonstrates that the hump-like shape in DTEC close to the time of the 6 April earthquake is not anomalous and cannot be considered a possible earthquake-related effect.
机译:在空间研究进展的一份报告中,Nenovski等人。 (2015)分析来自2009年4月6日的GPS测量的电离层TEC(总电子含量)数据,2009年4月6日的地震(意大利)地震。根据作者,在主要休克之前和不久之后,意大利两个GPS(全球定位系统)接收器计算的TEC差异(DTEC)从中部的两个GPS(全球定位系统)接收器显示出类似的驼峰状形状(随后的增加)。它们认为驼峰状形状是异常的,并且可能与地震有关。我们表明DTEC在冲击前的时间内增加,以及随后的缓慢降低,没有任何可能支持与地震的可能关系的特征。我们还使用Nenovski等人分析的相同GPS数据进行了自己的独立分析。 (2015)。我们已经发现了DTEC时间序列的昼夜变化,显示了像Nenovski等人报告的类似驼峰状形状。 (2015)在整个调查期间。这表明DTEC中的驼峰状形状接近4月6日地震的时间不是异常的,不能被认为是可能的地震相关效果。

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