The Indian Ocean Tsunami 2004 in the ionosphere: observations and modelling

Details The Indian Ocean Tsunami 2004 in the ionosphere: observations and modelling The Indian Ocean Tsunami 2004 in the ionosphere: observations and modelling

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufm.u52a..03o&link_type=abstract

American Geophysical Union, Fall Meeting 2006, abstract #U52A-03

Computer Science

Sound

1220 Atmosphere Monitoring With Geodetic Techniques (6952), 2427 Ionosphere/Atmosphere Interactions (0335), 3384 Acoustic-Gravity Waves, 4255 Numerical Modeling (0545, 0560), 4564 Tsunamis And Storm Surges

Scientific paper

The Indian Ocean Tsunami, on the 26^{th} December 2004, produced the largest set of data in the tsunami history. The same revolution produced by the Chile and Alaska earthquakes in the '60s, for normal modes and seismic effects in the ionosphere respectively, has been produced today for tsunami detection in the way of ionospheric sounding. Total electron content (TEC) perturbations have been observed in all Indian Ocean by GPS receivers [DasGupta et al., 2006, Liu et al. 2006a,b] and dual frequency altimeters Jason-1 and Topex/Poseidon [Artru et al., 2005b]. We have recently reproduced by accurate 3D modelling the observed perturbations in the overlying neutral and ionized atmosphere. The model was confirmed by altimeter TEC data. Here, we present in review the different observations in the light of modelling, to explain the inhomogeneous amplitudes observed by GPS receivers in relationship with magnetic field inclination and geometrical structure of tsunami wavefront. [Artru et al., 2005b] Space Res. Today, 163, 23-27. [DasGupta et al., 2006] Earth Planet. Space, 35, 929-959. [Liu et al., 2006a] Geophys. Res. Lett., 33, L02103. [Liu et al., 2006b] J. Geophys. Res., 111, A05303.

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