Tunneling of low-frequency waves through the subcrustal lithosphere

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K. Fuchs
K. Schulz


Tunnel waves are long period waves which on overcritical incidence have penetrated through thin high-velocity layers. The generation and propagation of these waves are studied by numerical experiments using synthetic seismograms. Tunnel waves may occur as secondary and primary arrivals, on retrograde and prograde branches. Observations from explosion and teleseismic data with low-frequency tunnel waves are presented.  A model of the lower lithosphere with thin high-velocity layers explains not only the occurrence of tunnel waves but also the high-frequency transmission of Pn and Sn waves to teleseismic distances. This model is in accordance with the observation of seismic anisotropy in the upper mantle and suggests refinements of existing petrological models of the lower lithosphere.

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Fuchs, K., and K. Schulz. 1976. “Tunneling of Low-Frequency Waves through the Subcrustal Lithosphere”. Journal of Geophysics 42 (1), 175-90. https://journal.geophysicsjournal.com/JofG/article/view/86.
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Ansorge, J., Mueller, St. (1973) The P-wave structure of the uppermost mantle in Europe based on longrange explosion observations. J. Geophys. 39:385-394

Bamford, D. (1973) Refraction data in Western Germany - a time-term interpretation. J. Geophys. 39:907-928

Bamford, D., Faber, S., Jacob, B., Kaminski, W., Nunn, K., Prodehl, C., Fuchs, K., King. R., Willmore, P. (1976) A lithospheric seismic profile in Britain - I. Preliminary results. Geophys. J. 44:145-160

Bath, M. (1966) Propagation of Sn and Pn to teleseismic distances. Pure Appl. Geophys. 64:19-30

Bath, M. (1967) Observation of teleseismic Pn phases. Pure Appl. Geophys. 66:30-36

Berry, M., Fuchs, K. (1973) Crustal structure of the Superior and Greenville Provinces of the northeastern Canadian Shield. Bull. Seism. Soc. Am. 63:1393-1432

Brekhovskikh, L. (1960) Waves in layered media. Academic Press, New York

Červeny, C., Kozak, J. (1972) Experimental evidence and investigation of pseudospherical waves. J. Geophys. 38:617-626

Červeny, V., Kozak, J., Pseucik, I. (1972) Refraction of elastic waves into a medium of lower velocity - pseudospherical waves. Pure Appl. Geophys. 92:115-132

Fuchs, K., Muller, G. (1971) Computation of synthetic seismograms with the reflectivity method and comparison with observations. Geophys. J. 23:417-433

Green, D.H., Liebermann, R.C. (1975) Phase equilibria and physical properties at the low velocity zones. Abstr. of paper presented at the XVI. General Assembly of IUGG, Grenoble

Hales, A.L., Helsley, C.E., Nation, J.B. (1970) P travel times for an oceanic path. J. Geophys. Res. 75:7362-7381

Hirn, A., Steinmetz, L., Kind, R., Fuchs. K. (1973) Long range profiles in Western Europe: II. Fine structure of the lower lithosphere in France (Southern Bretagne). J. Geophys. 39:363-384

Kind, R. (1974) Long-range propagation of seismic energy in the lower lithosphere. J. Geophys. 40:189-202

Kosminskaya, I.P., Belyaevsky, N.A., Volvovsky, I.S. (1969) Explosion seismology in the USSR. In: Hart, P.J. (Ed.) The earth's crust and upper mantle. A.G.U. monogr. 13:195-208

Kosminskaya, I.P., Puzyrev, N.N., Alexeyev. A.S. (1972) Explosion seismology: its past, present and future. In: Ritsema, A.R. (Ed.) The upper mantle. Tectonophysics 13:309-323

Krey, Th. (1957) Erweiterte Moglichkeiten fur die Refraktionsseismik durch die Verwendung von Geophonen mit niedriger Eigenfrequenz. Geol. Jahrb. 74:523-530

Mayer-Rosa, D., Mueller, St. (1973) The gross velocity-depth distribution of P- and S-waves in the upper mantle of Europe from earthquake observations. J. Geophys. 39:395-410

Mellman, G. R., Helmberger, D. V. (1974) High-frequency attenuation by a thin high-velocity layer. Bull. Seism. Soc. Am. 64:1383-1388

Mituch, E., Posgay, K. (1972) Hungary. In: Muller, P. (Ed.) Geophysical Transact. Hungarian Geophys. Institute, Budapest, pp. 118-129

Molnar, P., Oliver, J. (1969) Lateral variations of attenuation in the upper mantle and discontinuities in the lithosphere. J. Geophys. Res. 74:2648-2682

Mueller, S., Prodehl, C., Mendes, A.-S., Moreira, V.S. (1973) Crustal structure in the southwestern part of the Iberian peninsula. Tectonophysics 20:307-318

Press, F., Oliver, J., Ewing, M. (1954) Seismic model study of refractions from a layer of finite thickness. Geophysics 19:388-401

Raitt, R.W., Shor jr., G.G., Francis, T.J., Morris. G.B. (1969) Anisotropy of the Pacific upper mantle. J. Geophys. Res. 74:3095-3109

Richards, P.G. (1973) Calculation of body waves. for caustics and tunneling in core phases. Geo phys. J. 35:243-264

Ryaboi, V.Z. (1966) Kinematic and dynamic characteristics of deep waves associated with boundaries in the crust and upper mantle. lzv. Acad. Sci. USSR, Geophys. Ser., AGU transl. 3:177-184

Sapin, M., Prodehl, C. (1973) Long range profiles in western Europe. I. Crustal structure between the Bretagne and the Central Massif Central. Ann. Geophys. 29:127-145

Schulz, K. (1975) Die Bedeutung von Tunnelwellen in der Explosionsseismik. Diplom-thesis, Universitat Karlsruhe, 94 p.

Sutton, G.H., Walker, D.A. (1972) Oceanic mantle phases recorded on seismographs in the northwestern Pacific at distances between 7° and 40°. Bull. Seism. Soc. Am. 62:631-655

Walker, D.A., Sutton, G.H. (1971) Oceanic mantle phases recorded on hydrophones in the northwestern Pacific at distances between 9° and 40°. Bull. Seism. Soc. Am. 61:65-78

Zverev, S., Tulina, Yu. (1971) Deep seismic sounding of the earth crust in the continental shelf between Sachalin and H9kkaido. NAUKA. Moscow, 281p.