1 Igel H, Weber M. SH-wave propagation in the whole mantle using high-order finite differences. Geophys Res Lett, 1995, 22: 731-734
[2]
2 Chaljub E, Tarantola A. Sensitivity of SS precursors to topography on the upper-mantle 660-km discontinuity. Geophys Res Lett, 1997, 24: 2613-2616
[3]
3 Igel H, Weber M. P-SV wave propagation in the Earth’ mantle using finite-differences: Application to heterogeneous lowermost mantle structure. Geophys Res Lett, 1996, 23: 415-418
[4]
4 Nissen-Meyer T, Fournier A, Dahlen F A. A 2-D spectral-element method for computing spherical-earth seismograms.—I. Moment-tensor source. Geophys J Int, 2007, 168: 1097-1093
[5]
5 Alterman Z, Aboudi J, Karal F C. Pulse propagation in a laterally heterogeneous solid elastic sphere. Geophys J R Astron Soc, 1970, 21: 243-260
[6]
6 Dablain M. The application of high-order differencing to the scalar wave equation. Geophysics, 1986, 51: 54-66
[7]
7 Graves R W. Simulating seismic wave propagation in 3D elastic media using staggered-grid finite differences. Bull seism Soc Am, 1996, 86: 1091-1106
[8]
8 Yang D H, Teng J W, Zhang Z J, et al. A nearly-analytic discrete method for acoustic and elastic wave equations in anisotropic media. Bull Seism Soc Am, 2003, 93: 882-890
[9]
9 Yang D H, Lu M, Wu R S, et al. An optimal nearly-analytic discrete method for 2D acoustic and elastic wave equations. Bull Seism Soc Am, 2004, 94: 1982-1992
[10]
10 Yang D H, Peng J M, Lu M, et al. Optimal nearly analytic discrete approximation to the scalar wave equation. Bull Seism Soc Am, 2006, 96: 1114-1130
[11]
11 Lapwood E R, Usami T. Free Oscillations of the Earth. Cambridge: Cambridge University Press, 1981
[12]
12 Kenneth B L N, Engdahl E R. Traveltimes for global Earthquake location and phase identification. Geophys J Int, 1991, 105: 429-465
