Detection of earthquake induced radon precursors by Hilbert Huang Transform

被引：27

作者：

Barman, Chiranjib ^{[1
]}

Ghose, Debasis ^{[1
]}

Sinha, Bikash ^{[1
]}

Deb, Argha ^{[2
]}

机构：

[1] Ctr Variable Energy Cyclotron, Dept Atom Energy, 1-AF Bidhannagar, Kolkata 700064, India

[2] Jadavpur Univ, Dept Phys, Kolkata 700032, India

来源：

JOURNAL OF APPLIED GEOPHYSICS | 2016年 / 133卷

关键词：

Soil radon-222; Ensemble Empirical Mode Decomposition; Hilbert Huang Transform; Earthquake precursor; Non-stationary; EMPIRICAL MODE DECOMPOSITION; TIME-SERIES; SOIL-GAS; EASTERN-INDIA; PREDICTION; ANOMALIES; FAULT; IDENTIFICATION; GEOCHEMISTRY; FREQUENCY;

D O I：

10.1016/j.jappgeo.2016.08.004

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Continuous measurement of radon-222 concentration in soil was carried out across duration of one year at a geologically faulted area having high regional heat flow to detect anomalies caused by seismic activities. The data reveals a range of periodicities present in the radon time series. To identify seismic induced radon changes we treat the time series data through various filtering methods to remove inherent periodicities. The Ensemble Empirical Mode Decomposition (EEMD) is deployed to decompose the signal into its characteristic modes. Hilbert Huang Transform (HHT) is applied for the first time on the physically significant modes obtained by EEMD to represent time-energy-frequency of the recorded soil radon time series. After removing the periodic and quasi-periodic constituents from the original time series, the simulated result shows a forceful correlation in recorded radon-222 anomalies with regional and local seismic events. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：123 / 131

页数：9

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