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ISSN 2415-3400 (Online)
ISSN 1028-821X (Print)

Interpretation of observations of global electromagnetic resonance by ionosphere non-uniformity localized over the earthquake center

heading: 
RADIOWAVE PROPAGATION, RADIOLOCATION AND REMOTE SENSING
Nickolaenko, AP, Galuk, YP, Hayakawa, M
Organization: 

 

O. Ya. Usikov Institute for Radiophysics and Electronics of the National Academy of Sciences of Ukraine
12, Proskura st., Kharkov, 61085, Ukraine
E-mail: sasha@ire.kharkov.ua
 

Sankt-Petersburg State University
35, University Avenue., St. Petersburg, Peterhof 198504, Russia
E-mail: j.galuk@spbu.ru
 

Institute Hayakawa, the seismic company electromagnetism,
Incubation Center 508 Telecommunication University,
Chofugaoka 1-5-1, Chofu, Tokyo 182-8585, Japan
E-mail: hayakawa@hi-seismo-em.jp
https://doi.org/10.15407/rej2019.03.021
Language: russian
Abstract: 

 

Objective and purpose of the work. We model disturbances in amplitude spectra of vertical electric and horizontal magnetic field components of the signals of global electromagnetic (Schumann) resonance by a seismogenic non-uniformity of the middle atmosphere. The point field source is used positioned at S-E Asia, Africa, or S. America. Observer is found at the Moshiri observatory in Japan (44.37 N, 142.24 E.) and the earthquake modifying the middle atmosphere is situated at Taiwan (21.82 N; 120.81 E). Disturbances are computed in amplitude Schumann resonance spectra and their similarity is demonstrated to observational data.

Methods and methodology of work. The propagation parameters of extremely low frequency (ELF) radio waves are found by using the full wave solution in form of Riccati equation. The spectral components of fields are found numerically be using the two dimension telegraph equations having the parameters of regular and non-uniform Earth – ionosphere cavity.

Results. We obtain numerical estimates for an impact of localized seismogenic non-uniformity on  amplitude spectra of electric and magnetic fields in the frequency band of global electromagnetic (Schumann) resonance. Similarity is demonstrated between the model and observational spectra.

Conclusion. The model suggested for a seismogenic non-uniformity in the moddle atmosphere allows to successfully interpret the observations ELF data.
Keywords: field disturbances by a localized non-uniformity, schumann resonance, seismogenic disturbance of moddle atmosphere conductivity

Manuscript submitted 26.12.2018
PACS: 93.85.Bc; 93.85.Jk; 94.20.Cf; 94.20.ws
Radiofiz. elektron. 2019, 24(3): 21-29

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