ИСТИНА

We study the mechanism for geomagnetic field perturbation associated with tsunami wave propagation. The source of perturbatiom is assumed to be electric currents in sea medium and the ionosphere. The electric current in the sea medium is due to the tsunami-produced wave motion of the seawater immersed in the geomagnetic field while the ionospheric current is due to acoustic-gravity wave (AGW) propagating from the atmosphere into the ionosphere. The AGW radiates into the ionosphere due to vertical displacement of seawater during tsunami wave propagation.