Normal modes modelling of post-seismic ionospheric oscillations - INSU - Institut national des sciences de l'Univers Access content directly
Journal Articles Geophysical Research Letters Year : 2001

Normal modes modelling of post-seismic ionospheric oscillations


Since 1960, several experiments have shown strong perturbations of the ionosphere after earthquakes. For the biggest quakes, Doppler ionospheric soundings have revealed displacements of several tens of meter of the ionized layers E and F. An accurate modelling of these phenomena was however never described.We present here synthetic displacements of such oscillations and compare it with experimental data. Realistic models of the atmosphere including viscosity are used, as well as realistic Earth and seismic source model. These ionospheric oscillations are computed by normal modes summation taking explicitly into account the coupling between the solid Earth and the open atmosphere. They are associated to the Rayleigh fundamental surface waves. We obtain a good agreement between synthetics and observations, so it should be possible to use this method to study the ionospheric post-seismic perturbations and possibly the high altitude profile of the density and the viscosity of the atmosphere.
Fichier principal
Vignette du fichier
Geophysical Research Letters - 2001 - Artru - Normal modes modelling of post%u2010seismic ionospheric oscillations.pdf (515.01 Ko) Télécharger le fichier
Origin : Publisher files allowed on an open archive

Dates and versions

insu-03597765 , version 1 (04-03-2022)





Juliette Artru, Philippe Lognonné, Elisabeth Blanc. Normal modes modelling of post-seismic ionospheric oscillations. Geophysical Research Letters, 2001, 28, pp.697-700. ⟨10.1029/2000GL000085⟩. ⟨insu-03597765⟩
9 View
19 Download



Gmail Facebook X LinkedIn More