Informational analysis of apparent Earth¡¯s resistivity time series to assess the reliability of magnetotelluric measurements

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• 作者：Luciano Telesca ; Michele Lovallo ; Gerardo Romano ; Han-Lun Hsu ; Chih-Wen Chiang ; Chien-chih Chen
• 关键词：Magnetotellurics ; Median absolute deviation ; Fisher Information Measure ; Shannon entropy
• 刊名：Journal of Asian Earth Sciences
• 出版年：2013
• 出版时间：15 November, 2013
• 年：2013
• 卷：77
• 期：Complete
• 页码：77-82
• 全文大小：1697 K

文摘

We used the informational methods of the Shannon entropy power and the Fisher Information Measure to analyze the time dynamics of one year of semi-daily values of apparent resistivity, calculated on the base of the magnetotelluric (MT) monitoring at Penghu Island, Taiwan. The performed statistics indicate that the day-time measurements present higher disorder and lower organization than the night-time measurements. Such difference is more evident for the high-frequency band of resistivity data, which suggests that possibly some source of the electromagnetic field could be of anthropic origin. Furthermore, we also note the characteristics of so-called MT dead-band with the periodicity of ¡«10 s could be revealed in the high values of Shannon entropy power.