The upper mantle structure under South-East Europe derived from GRF broadband records of Greek earthquakes

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H. Rademacher
R.I. Odom
R. Kind


Broadband recordings from the GRF (Grafenberg) Array of the strongest earthquakes from Greece are examined. A P-wave seismogram section of a number of events in the range between 1,300 and 2,100 km epicentral distance is constructed. The dominant feature in this section is the second arrival, which is the reflection from the 400 km discontinuity. Characteristic amplitude changes of this phase across the array are observed. The apparent velocity across the array of the first arriving P phase is very slow, indicating a slower upper mantle in SE Europe than in other regions. There is also a very weak indication of a third phase. The resulting model of the upper mantle, which was derived with the aid of theoretical seismograms, shows a pronounced discontinuity at a depth of 400 km. The time difference between the observed first two phases can be used for a fast estimation of the epicentral distance.

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Rademacher, H., Odom, R., & Kind, R. (1983). The upper mantle structure under South-East Europe derived from GRF broadband records of Greek earthquakes. Journal of Geophysics, 52(1), 7-13. Retrieved from
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Baer, M.T. (1979) Kalibrierung des neuen Stationsnetzes des Schweizerischen Erdbebendienstes im Hinblick auf die Verbesserung der Lokalisierung seismischer Ereignisse mit Epizentralentfernungen bis 100Grad. Ph.D.-Thesis, ETH Ziirich

Burdick, L.J. (1981) A comparison of the upper mantle structure beneath north America and Europe. J. Geophys. Res. 86, 5926-5936

Burdick, L.J., Heimberger, D.V. (1978) The upper mantle P velocity structure of the Western United States. J. Geophys. Res. 83, 1699-1712

England, P.C., Worthington, M.H., King, D.W. (1977) Lateral variation in the structure of the upper mantle beneath Eurasia. Geophys. J. R. Astron. Soc. 48, 71 - 79

Given, J.W. and Heimberger, D.V. (1980) Upper mantle of Northwestern Eurasia. J. Geophys. Res. 85, 7183- 7194

Hales, A.L. (1972) The travel times of P waves and their relevance to the upper mantle velocity distribution. Tectonophysics 13, 447- 482

Hanka, W. (1982) Analysis of broad-band Rayleigh waves: a possibility for seismic discrimination. J. Geophys. 51, 165- 179

Harjes, H.-P., Seidl, D. (1978) Digital recording and analysis of broadband seismic data of the Graefenberg (GRF) Array. J. Geophys. 44, 511- 523

Kind, R. (1978) The reflectivity method for a buried source. J. Geophys. 44, 603- 612

Kind, R. (1979a) Extensions of the reflectivity method. J. Geophys. 45, 373- 380

Kind, R. (1979b) Observations of sPn from Swabian Alb earthquakes at the GRF Array. J. Geophys. 45, 337- 340

Kind, R., Seidl, D. (1982) Analysis of broadband seismograms from the Chile- Peru Area. Bull. Seismol. Soc. Am. 72, 2131- 2146

King, D.W., Calcagnile, G. (1976) P-wave velocities in the upper mantle beneath Fennoscnadia and Western Russia. Geophys. J. R. Astron. Soc. 46, 407-432

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. Z. Geophys. 39, 395-410

McKenzie, D. (1972) Active tectonics of the Mediterranean Region. Geophys. J. R. Astron. Soc. 30, 109- 185

Miiller, G., Bonjer, K.-P., Stock!, D. , Enescu, D. (1978) The Romanian earth-quake of March 4, 1977. I. Rupture process inferred from fault-plane solution and multiple-event analysis. J. Geophys. 44, 203- 218

Rakers, E., Miiller, G. (1982) The Romanian earthquake of March 4, 1977. Ill. Improved focal model and moment determination. J. Geophys. 50, 143- 150

Seidl D., Kind, R. (1982) Das instrumentelle und seismologische Konzept des Graefenburg-Array. Geol. Jahrb. £23, 207-220

Stoll, D. (1980) Determination of focal parameters of five 1976 Friuli earth-quakes from Rayleigh wave spectra. Boll. Geofis. Teor. Appl. 22(85), 3-12

Upadhyay, S.K., Duda, S.J. (1980) Source parameters of earthquakes from the Himalayan Region. J. Geophys. 48, 67- 79