Geodesic
The numerical study of the properties of quasilocal plane waves of the modal type in the case of a~thin low-velocity layer that is in contact with an elastic half-space
Zapiski Nauchnykh Seminarov POMI, Mathematical problems in the theory of wave propagation. Part 33, Tome 308 (2004), pp. 182-196

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The numerical study of the properties of quasilocal plane waves of the modal type propagating deep into a medium is carried out by the example of the model of a low-velocity elastic layer in the case of the rigid contact with an underlying half-space. It is established that the genesis of these waves is closely connected with the singular complex roots of the dispersion equation of the problem. Eighteen variants of the model differing by the relative parameters of the problem that have a physical sence are considered. For every variant the seismograms of the modal and body waves are computed and the comparison of them by intensity is carried out. 
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     author = {Yu. A. Surkov and V. V. Reshetnikov},
     title = {The numerical study of the properties of quasilocal plane waves of the modal type in the case of a~thin low-velocity layer that is in contact with an elastic half-space},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {182--196},
     publisher = {mathdoc},
     volume = {308},
     year = {2004},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2004_308_a10/}
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Yu. A. Surkov; V. V. Reshetnikov. The numerical study of the properties of quasilocal plane waves of the modal type in the case of a~thin low-velocity layer that is in contact with an elastic half-space. Zapiski Nauchnykh Seminarov POMI, Mathematical problems in the theory of wave propagation. Part 33, Tome 308 (2004), pp. 182-196. http://geodesic.mathdoc.fr/item/ZNSL_2004_308_a10/