On the Relative Effect of Magnitude and Depth of Earthquakes in the Generation of Seismo-Ionospheric Perturbations at Middle Latitudes as Based on the Analysis of Subionospheric Propagation Data of JJY (40 kHz)-Kamchatka Path

Masashi Hayakaw, Alexander Rozhnoi, Maria Solovieva

Advanced Wireless Communications Research Center, University of Electro-Communications (UEC), Tokyo, Japan;Hayakawa Institute of Seismo Electromagnetics, Co. Ltd., UEC Incubation Centre, Tokyo, Japan.
Institute of Physics of the Earth, Russian Academy of Sciences, Moscow, Russia.
nstitute of Physics of the Earth, Russian Academy of Sciences, Moscow, Russia.

DOI: 10.4236/ojer.2013.22003                

Abstract

The relative importance of magnitude and depth of an earthquake (EQ) in the generation of seismo-ionospheric perturbations at middle latitudes is investigated by using the EQs near the propagation path from the Japanese LF transmitter, JJY (at Fukushima) to a receiving station at Petropavsk-Kamchatsky (PTK) in Russia during a three-year period of 2005-2007. It is then found that the depth (down to 100km) is an extremely unimportant factor as compared with the magnitude in inducing seismo-ionospheric perturbations at middle latitudes. This result for sea EQs in the Izu-Bonin and Kurile-Kamchatka arcs is found to be in sharp contrast with our previous result for Japanese EQs mainly of the fault-type. We try to interpret this difference in the context of the lithosphere-atmosphere-ionosphere coupling mechanism.

Keywords

VLF/LF Subionospheric Propagation; Ionospheric Perturbation; Earthquake precursors; Earthquake Prediction

Conflicts of Interest

The authors declare no conflicts of interest.

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