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Application of ensemble empirical mode decomposition for analyzing geoelectric field during storm time
LIU Jin 1 * #,SUN Weihuai 2,LIU Lu 3
1.School of Resources and Environment & Earth Science , Yunnan University, KunMing 650091
2.Yunnan Earthquake Administration, Yuxi 652700
3.Yunnan State Grid, China Southern Power Grid, Kunming 650011
*Correspondence author
#Submitted by
Subject:
Funding: The Science and Technology Youth Planning Project of Yunnan Province, China（No.No.K1010827）, The Educational Commission Foundation of Yunnan Province, China （No.No.K1050650）
Opened online:22 August 2013
Accepted by: none
Citation: LIU Jin,SUN Weihuai,LIU Lu.Application of ensemble empirical mode decomposition for analyzing geoelectric field during storm time[OL]. [22 August 2013] http://en.paper.edu.cn/en_releasepaper/content/4554903
 
 
In this paper, we preliminarily apply the Ensemble Empirical Mode Decomposition (EEMD) technique for decomposing geomagnetic signals in July, 2012, for extracting the major storm-time fluctuations as a combining of intrinsic oscillatory modes (IMFs). By estimating the induced geoelectric field by PWM method, it is comfirmed that the high-frequency (0.01-1Hz) geomagnetic variation play a main role in inducing geoelectric field on the earth surface. The results indicates that the combination of EEMD and Hilbert-Transform is indeed an efficient method for analyzing the multi-scale features of geomagnetic storm-time disturbance.
Keywords:Ensemble Empirical Mode Decomposition; Induced geoelectric field; Geomagnetic storm
 
 
 

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