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Fractal Analysis of Ulf Electromagnetic Emissions in Possible Association with Earthquakes in China : Volume 19, Issue 5 (19/10/2012)

By Ida, Y.

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Book Id: WPLBN0003974188
Format Type: PDF Article :
File Size: Pages 7
Reproduction Date: 2015

Title: Fractal Analysis of Ulf Electromagnetic Emissions in Possible Association with Earthquakes in China : Volume 19, Issue 5 (19/10/2012)  
Author: Ida, Y.
Volume: Vol. 19, Issue 5
Language: English
Subject: Science, Nonlinear, Processes
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Sun, H., Li, Q., Yang, D., Hayakawa, M., & Ida, Y. (2012). Fractal Analysis of Ulf Electromagnetic Emissions in Possible Association with Earthquakes in China : Volume 19, Issue 5 (19/10/2012). Retrieved from

Description: Research Station on Seismo Electromagnetics, The University of Electro-Communications (UEC), 1-5-1 Chofugaoka, Chofu Tokyo 182-8585, Japan. The long-term data (during the period of 1 March 2003 through 31 December 2006) of ULF geomagnetic variations observed at Kashi station (geographic coordinates: 39.5° N, 76.0° E) in China have been used to investigate the long-term variation of fractal dimension of ULF emissions. We have studied the changes in fractal dimension in association with several earthquakes around the observation station. It is then found that a significant change (or decrease) in the fractal dimension of the Z component took place before the 1 September 2003 earthquake, which lends a further support to our previous finding based on our improved polarization analysis for the same earthquake. The results obtained are discussed in the contexts of a few aspects (detectability of seismogenic emissions, comparison with previous results by other analysis methods, the importance of fractal analysis in the nonlinear process of the lithosphere and earthquake prediction).

Fractal analysis of ULF electromagnetic emissions in possible association with earthquakes in China

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