Probing the lower ionospheric perturbations associated with earthquakes by means of subionospheric VLF/LF propagation

作     者：Masashi Hayakawa 

作者机构：Advanced Wireless Communications Research Center and Research Station on Seismo ElectromagneticsThe University of Electro-Communications1-5-1 ChofugaokaChofu Tokyo 182-8585Japan Earthquake Analysis LaboratoryInformation Systems Inc.Kita-Aoyama 2-12-42-R305Minato-kuTokyo 107-0061Japan 

出 版 物：《Earthquake Science》 (地震学报（英文版）)

年 卷 期：2011年第24卷第6期

页      面：609-637页

核心收录：

学科分类：080904[工学-电磁场与微波技术] 070801[理学-固体地球物理学] 0809[工学-电子科学与技术（可授工学、理学学位）] 07[理学] 08[工学] 0708[理学-地球物理学] 

基　　金：Financially supported by the Special Project for Earthquake Research 

主　　题：Earth-ionosphere waveguide subionospheric VLF/LF propagation seismo-ionosphericperturbation earthquake lithosphere-atmosphere-ionosphere coupling 

摘      要：There have been reports for many years that the ionosphere is very sensitive to seismic effects, and the detection of ionospheric perturbations associated with earthquakes （EQs） attracts a lot of attention as a very promising candidate for short-term EQ prediction. In this review we present a possible use of VLF/LF （very low frequency （3-30 kHz）/low frequency （30-300 kHz）） radio sounding of seismo-ionospheric perturbations. In order to avoid the overlapping with my own previous reviews, we first show some pioneering results for the Kobe EQ and we try to present the latest results including the statistical evidence on the correlation between the VLF/LF propagation anomalies （ionospheric perturbations） and EQs （especially with large magnitude and with shallow depth）, medium-distance （6-8 Mm） propagation anomalies, the fluctuation spectra of subionospheric VLF/LF data （the effect of atmospheric gravity waves, the effect of Earth＇s tides, etc.）, and the mechanism of lithosphere-atmosphere-ionosphere coupling. Finally, we indicate the present situation of this kind of VLF/LF activities going on in different parts of the globe and we suggest the importance of international collaboration in this seismo-electromagnetic study.