SIMULATION OF SEISMIC AND ACOUSTICGRAVITY WAVE PROPAGATION IN A HETEROGENEOUS `EARTHATMOSPHERE' MODEL
B.G. Mikhailenko and G.V. Reshetova
Institute of Computing Mathematics and Mathematical Geophysics, Siberian Branch of the RAS, 6 prosp. Akad. Lavrentieva, Novosibirsk, 630090, Russia
Keywords: Seismic waves, acousticgravity waves, Laguerre transform, finitedifference method
Pages: 541550
Abstract
A numericalanalytical solution for seismic and acousticgravity wave propagation is applied to a heterogeneous `Earthatmosphere' model. Seismic wave propagation in elastic earth is described by a system of firstorder dynamic equations of the elasticity theory and propagation of acousticgravity waves in the atmosphere by the linearized NavierStokes equations. The solution algorithm combines the timedomain integral Laguerre transform, the finite integral Bessel transform along the radial coordinate, and the FD solution of the reduced problem along the vertical coordinate. The suggested algorithm is tested with numerical experiments for the heterogeneous `Earthatmosphere' model for different source locations.
