, University of Electro-Communications, Hayakawa Institute of Seismo-Electromagnetics Co. Ltd., Tokyo, Japan
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Annals of Geophysics Vol. 55 No. 1 (2012) - EARTHQUAKE PRECURSORS / Special Issue ed. by P.F. Biagi, M.E. Contadakis, M. Hayakawa and T. Maggipinto
Possible precursor to the March 11, 2011, Japan earthquake: ionospheric perturbations as seen by subionospheric very low frequency/low frequency propagation
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