Tsunami normal modes with solid earth and atmospheric coupling and inversion of tsunami height using GPS data
Séminaires Planétologie et Sciences Spatiales
Salle 727 - Lamarck A -
Large underwater earthquakes (M>7) can transmit part of their energy to the surrounding ocean through large sea-floor motions, generating tsunamis that propagate over long distances. The forcing effect of long period ocean surface vibrations due to tsunami waves on the atmosphere triggers atmospheric internal gravity waves (IGWs) that induce ionospheric disturbances when they reach the upper atmosphere. We study the IGWs associated with tsunamis using normal modes modeling and performed inversion of the GPS TEC data in order to retrieve the tsunami height.