Seismo-ionospheric perturbations, and the precursors to the 2011 Japan earthquake

Author

Hayakawa, Masashi

Author_Institution

Adv. Wireless Commun. Res. Center, Univ. of Electro-Commun., Chofu, Japan

fYear

2014

fDate

12-16 May 2014

Firstpage

155

Lastpage

158

Abstract

The ionospheric perturbations have been found to take place prior to an earthquake (EQ) (with magnitude greater than 5.5 (or so) and with shallow depth), on the basis of the long-term VLF/LF subionospheric propagation. Then, there have been presented the precursors to the recent 2011 Japan EQ. That is, the ionospheric perturbation was definitely found on the basis of two completely different phenomena ((i) subionospheric VLF/LF propagation anomaly and (ii) ULF magnetic field depression). Further, atmospheric ULF/ELF radiation was observed a few days before the EQ.

Keywords

atmospheric radiation; earthquakes; ionospheric electromagnetic wave propagation; seismology; AD 2011; Japan earthquake precursor; ULF magnetic field depression; atmospheric ULF-ELF radiation; long-term VLF-LF subionospheric propagation; seismo-ionospheric perturbation; subionospheric VLF-LF propagation anomaly; Atmospheric measurements; Correlation; Earthquakes; Geophysical measurement techniques; Ground penetrating radar; Magnetic fields; Market research; ULF depression; atmospheric ELF radiation; earthquake precursor; earthquake prediction; ionospheric perturbation; subionospheric VLF/LF propagation;

fLanguage

English

Publisher

ieee

Conference_Titel

Electromagnetic Compatibility, Tokyo (EMC'14/Tokyo), 2014 International Symposium on

Conference_Location

Tokyo

Type

conf

Filename

6997093