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A possible effect of ionospheric perturbations associated with the Sumatra earthquake, as revealed from subionospheric very-low-frequency (VLF) propagation (NWC-Japan)

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Abstract:

The observation of subionospheric very-low-frequency (VLF) propagation between the transmitter NWC (Australia) (frequency 19.8 kHz) and our three receiving sites in Japan (Chofu, Chiba, and Kochi) are used to find a possible precursor of ionospheric perturbations to the Sumatra earthquake in late December 2004. Night-time fluctuations in VLF propagation data at all three sites have exhibited significant enhancements from 4 days before the earthquake, which is likely to be a precursor to the earthquake.

Document Type: Research Article

DOI: https://doi.org/10.1080/01431160601094476

Affiliations: Department of Electronic Engineering, The University of Electro-Communications, 1-5-1 Chofugaoka, Chofu Tokyo, Japan

Publication date: 2007-07-01

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