Japan Geoscience Union Meeting 2014

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Oral

Symbol M (Multidisciplinary and Interdisciplinary) » M-IS Intersection

[M-IS29_29PM2] Electromagnetic phenomena associated with seismic and volcanic activities

Tue. Apr 29, 2014 4:15 PM - 6:00 PM 313 (3F)

Convener:*Tetsuya Kodama(Earth Observation Research Center, Space Applications Mission Directorate, Japan Space Exploration Agency), Jun Izutsu(College of Engineering, Chubu University), Yasuhide Hobara(Graduate School of Information and Engineering Department of Communication Engineering and Informatics, The University of Electro-Communications), Toshiyasu Nagao(Earthquake Prediction Research Center, Tokai University), Chair:Toshiyasu Nagao(Earthquake Prediction Research Center, Tokai University), Tetsuya Kodama(Earth Observation Research Center, Space Applications Mission Directorate, Japan Space Exploration Agency)

5:45 PM - 6:00 PM

[MIS29-P03_PG] Identification of seismo - ionospheric signatures by using amplitude and phase information of VLF/LF transmitter waves

3-min talk in an oral session

*Kenshin TATSUTA1, Yasuhide HOBARA1 (1.Graduate School of Informatics and Communication Eng. , The University of Electro-Communications)

Keywords:seismo - ionospheric perturbation, FDTD method, VLF/LF transmitter, earthquake

In this paper, we analyse the VLF/LF transmitter signals in association with major seismic activities over Japan. Particular attention is paid to phase in addition to amplitude information of the VLF/LF signals. As a result, significant change both in the phase and amplitude are identified as an anomaly of seismo - ionospheric signatures. Moreover, the results of numerical analysis of VLF/LF transmitter waves in the earth - ionosphere waveguide by using FDTD method are in good agreement with the experimental results. We conclude that simultaneous use of amplitude and phase information of VLF/LF signal will be useful to identify the special scale of seismo - ionospheric anomalies.