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The ultra-low-frequency magnetic disturbances associated with earthquakes |
Masashi Hayakawa1, 2, 3, 4, Yasuhide Hobara2, 5, Kenji Ohta6, Katsumi Hattori7 |
1 Advanced Wireless Communications Research Center, The University of Electro-Communications, 1-5-1 Chofugaoka, Chofu Tokyo 182-8585, Japan
2 Research Station on Seismo Electromagnetics, The University of Electro-Communications, 1-5-1 Chofugaoka, Chofu Tokyo 182-8585, Japan
3 Hayakawa Institute of Seismo Electromagnetics, Co. Ltd., Incubation Center, The University of Electro-Communications, Chofu Tokyo182-8585, Japan
4 Information Systems Corp., Earthquake Analysis Laboratory, Kita-Aoyama 2-14-42-305, Minato-ku Tokyo 107-0061, Japan
5 Graduate School of Informatics and Engineering, The University of Electro-Communications, Chofu Tokyo 182-8585, Japan
6 Department of Electronic Information, Chubu University, 1200 Matsumoto-cho, Kasugai Aichi 487-8501, Japan
7 Faculty of Science, Chiba University, 1-33 Yayoi, Inage Chiba 263-8522, Japan |
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Abstract The ultra-low-frequency (ULF) electromagnetic emission is recently recognized as one of the most promising candidates for short-term earthquake (EQ) prediction. This paper reviews previous convincing evidence on the presence of ULF emissions before three major EQs. Then, we present further statistical study on the ULF occurrence, our networks of ULF monitoring in different spatial scales in Japan and finally we present several signal processings to identify the seismogenic emissions by showing latest results for recent large EQs.
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Received: 13 May 2011
Published: 10 December 2011
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Corresponding Authors:
Masashi Hayakawa
E-mail: hayakawa@whistler.ee.uec.ac.jp
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