<p>Simulating Anomalous Acoustic Transparency between Earth, Ocean and Atmosphere Using the Fast Field Program

A seismo-acoustic event is an event in which seismic energy transfers toacoustic energy in the oceans and/or atmosphere (infrasound waves) andvice versa. Ray theory predicts that less than 0.01% of the energy will betransmitted through the earth/ocean into the atmosphere. Therefore, it isusually considered as a perfect reflector. Clear observations of infrasoundwaves that originated from underwater or underground sources contradictthe classical theory.Under specific conditions, anomalous transparency of the earth-atmosphereand ocean-atmosphere interfaces is predicted. It allows most of the energy tobe transmitted into the atmosphere and more horizontal propagating waveswill appear. In this presentation, different seismo-acoustic case studies willbe investigated numerically. Coupling through earth-ocean-atmosphere in-terfaces is simulated using the Fast Field Program (FFP). Numerical resultswill be presented.