We describe how to implement seismic sources in a 2D staggered grid of a finite difference scheme of P-SV wave propagation. By comparison with analytical solutions in a homogeneous medium, we show that a very simple numerical description of sources in a second-order scheme provides good accuracy for radiated waves if one takes the elementary length where 2D stresses are applied as the grid step of the numerical scheme. The accuracy will depend on the grid step and the time step. The error is less than 10% and depends on the azimuth to the station.
Numerical Source Implementation In A 2d Finite-difference Scheme For Wave-propagation / O., Coutant; J., Virieux; Zollo, Aldo. - In: BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA. - ISSN 0037-1106. - STAMPA. - 85:(1995), pp. 1507-1512.
Numerical Source Implementation In A 2d Finite-difference Scheme For Wave-propagation
ZOLLO, ALDO
1995
Abstract
We describe how to implement seismic sources in a 2D staggered grid of a finite difference scheme of P-SV wave propagation. By comparison with analytical solutions in a homogeneous medium, we show that a very simple numerical description of sources in a second-order scheme provides good accuracy for radiated waves if one takes the elementary length where 2D stresses are applied as the grid step of the numerical scheme. The accuracy will depend on the grid step and the time step. The error is less than 10% and depends on the azimuth to the station.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.