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VLF/LF Radio Sounding of Ionospheric Perturbations Associated with Earthquakes
Department of Electronic Engineering and Research Station on Seismo Electromagnetics, The University of Electro-Communications, 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585, Japan
Received: 18 June 2007 / Accepted: 5 July 2007 / Published: 10 July 2007
Abstract: It is recently recognized that the ionosphere is very sensitive to seismic effects,and the detection of ionospheric perturbations associated with earthquakes, seems to bevery promising for short-term earthquake prediction. We have proposed a possible use ofVLF/LF (very low frequency (3-30 kHz) /low frequency (30-300 kHz)) radio sounding ofthe seismo-ionospheric perturbations. A brief history of the use of subionospheric VLF/LFpropagation for the short-term earthquake prediction is given, followed by a significantfinding of ionospheric perturbation for the Kobe earthquake in 1995. After showingprevious VLF/LF results, we present the latest VLF/LF findings; One is the statisticalcorrelation of the ionospheric perturbation with earthquakes and the second is a case studyfor the Sumatra earthquake in December, 2004, indicating the spatical scale and dynamicsof ionospheric perturbation for this earthquake.
Keywords: Ionospheric perturbations; VLF/LF radio sounding; earthquake prediction
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MDPI and ACS Style
Hayakawa, M. VLF/LF Radio Sounding of Ionospheric Perturbations Associated with Earthquakes. Sensors 2007, 7, 1141-1158.
Hayakawa M. VLF/LF Radio Sounding of Ionospheric Perturbations Associated with Earthquakes. Sensors. 2007; 7(7):1141-1158.
Hayakawa, Masashi. 2007. "VLF/LF Radio Sounding of Ionospheric Perturbations Associated with Earthquakes." Sensors 7, no. 7: 1141-1158.