INVESTIGATIONS ON THE NONELASTIC BEHAVIOR OF THE UPPER MANTLE.
Quarterly narrative progress rept. (scientific rept.), no. 1, 1 May-31 Jul 65,
TECHNISCHE HOCHSCHULE KARLSRUHE (WEST GERMANY) GEOPHYSIKALISCHES INSTITUT
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The distorting effect of the earths crust on the spectrum of seismic signals which are transmitted from the source through the mantle to the receiving station is discussed. In an attempt to correct for the influence of the receiver-crust a crustal model for the region of the Grafenberg Observatory GGGR near Nurnberg, Germany, has been derived. Its main features are a positive velocity gradient at the top of the crystalline basement, a low-velocity channel at a depth of about 10 km, and the possible existance of a high-velocity layer just above the MOHOROVICIC discontinuity. The presence of this layer could be detected from the spectra of body waves. Author
- Geology, Geochemistry and Mineralogy