Geodesic
Waves crossing the highvelocity elastic layer
Zapiski Nauchnykh Seminarov POMI, Mathematical problems in the theory of wave propagation. Part 18, Tome 173 (1988), pp. 134-141 
N. S. Smirnova. Waves crossing the highvelocity elastic layer. Zapiski Nauchnykh Seminarov POMI, Mathematical problems in the theory of wave propagation. Part 18, Tome 173 (1988), pp. 134-141. http://geodesic.mathdoc.fr/item/ZNSL_1988_173_a11/
@article{ZNSL_1988_173_a11,
     author = {N. S. Smirnova},
     title = {Waves crossing the highvelocity elastic layer},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {134--141},
     year = {1988},
     volume = {173},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1988_173_a11/}
}
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UR  - http://geodesic.mathdoc.fr/item/ZNSL_1988_173_a11/
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Theoretical seismograms of the waves crossing the highvelocity elastic layer are calculated. It is noted that the longitudinal wave has a low frequency phase. The phase propagation time coincides with the propagation time of the longitudinal wave screened by the layer.