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ISSN Печать: 0040-2508
ISSN Онлайн: 1943-6009
Indexed in
DISTURBANCES OF LOWER IONOSPHERE ABOVE CENTER OF EARTHQUAKE AND ANOMALY IN THE GLOBAL ELECTRO-MAGNETIC RESONANCE SIGNAL - PART 1: MODELS OF IONOSPHERE
Краткое описание
We model an effect on the Schumann resonance signal recorded in Japan of the ionosphere non-uniformity centered above the earthquake at Taiwan. Changes in the resonance spectrum occur due to interference of the direct radio wave with one reflected from the ionosphere modification above the earthquake. The first part addresses the typical models of ELF radio propagation constant and connects this with the vertical profile of atmospheric conductivity. The profile with a knee is analyzed, which is widely used for modeling the Schumann resonance. The four models are included used in literature for obtaining the frequency dependence of complex propagation constant of ELF radio waves. It is assumed that the pre-seismic and seismic activity locally reduces the height of the lower-boundary of the ionosphere above the earthquake. The maximum reduction reaches 20 km, and the symmetric perturbation is described along the radius by the Gauss curve of the scale of 1000 km.
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Nickolaenko A. P., Hayakawa M., Disturbances of lower ionosphere above the center of earthquake and anomaly in the global electromagnetic resonance signal. Part 2. Anomalies in the power spectra, RADIOFIZIKA I ELEKTRONIKA, 20, 2, 2015. Crossref
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Christofilakis Vasilis, Tatsis Giorgos, Votis Constantinos, Contopoulos Ioannis, Repapis Christos, Tritakis Vasilis, Significant ELF perturbations in the Schumann Resonance band before and during a shallow mid-magnitude seismic activity in the Greek area (Kalpaki), Journal of Atmospheric and Solar-Terrestrial Physics, 182, 2019. Crossref
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Florios K., Contopoulos I., Christofilakis V., Tatsis G., Chronopoulos S., Repapis C., Tritakis V., Pre-seismic Electromagnetic Perturbations in Two Earthquakes in Northern Greece, Pure and Applied Geophysics, 177, 2, 2020. Crossref