Far-field coseismic ionospheric disturbances of Tohoku earthquake

0449103 - ÚFA 2016 RIV GB eng J - Journal Article
Krasnov, V. M. - Drobzheva, Ya. V. - Chum, Jaroslav
Far-field coseismic ionospheric disturbances of Tohoku earthquake.
Journal of Atmospheric and Solar-Terrestrial Physics. Roč. 135, December (2015), s. 12-21. ISSN 1364-6826. E-ISSN 1879-1824
R&D Projects: GA ČR(CZ) GC15-07281J
Institutional support: RVO:68378289
Keywords : earthquake * infrasonic waves * ionospheric disturbances * infrasound triggered by the earthquake * co-seismic ionospheric perturbations * modeling * remote sensing
Subject RIV: DG - Athmosphere Sciences, Meteorology
Impact factor: 1.463, year: 2015
http://www.sciencedirect.com/science/article/pii/S1364682615300584

A computer code has been developed to simulate the generation of infrasonic waves by a strong earthquake at a distance of 9000 km from the epicenter, their propagation through the atmosphere and their effects in the ionosphere. We provide estimates of the perturbations in the ionosphere at the height (210–220 km) where radio waves at the sounding frequency (3.595 MHz) of a continuous Doppler radar reflect. Ionospheric perturbations have a global character and amplitudes of 1.5–7.5% of ambient value. Perturbations exist for ~1 h. The form of calculated ionospheric disturbances coincides with the experimental results. The correlation coefficient between calculated and experimental forms was from 0.68 to 0.9.
Permanent Link: http://hdl.handle.net/11104/0250683