Based on vectorial seismic theor y, a high-order finite difference scheme fo r 2D isotropic media is derived in the paper which can achieve reverse-time extrapolat ion of elastic waves.

• 从矢量波动理论出发,导出了二维弹性波逆时传播的高阶差分格式,实现了弹性波在数值空间中的逆时延拓。