Anelasticity in the Earth by Frank D. Stacey, M. S. Paterson, A. Nicholas

By Frank D. Stacey, M. S. Paterson, A. Nicholas

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Published via the yankee Geophysical Union as a part of the Geodynamics Series.

The indisputable fact that the fabrics within the sturdy components of the Earth go away from completely elastic behaviour is now relevant to primary geophysical stories. sluggish deformation (creep) by means of the approaches of mantle convection has been broadly recognized for approximately 25 years; it's been realised much longer that seismic waves are attenuated yet extra lately there has constructed a basic if obscure know-how of a likely correlation among excessive attenuation and occasional resistance to creep and within the previous few years seismic attenuation has obtained a lot higher cognizance since it implies a primary order dispersion of physique waves (frequency dependence of elasticity).

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Chung, W-Y. and H. Kanamori, Subduction process of a fracture zone and aseismic ridges Local mechanisms and source characteristics of the New Hebrides earthquake of 1969 January 19 and somerelated events, Geophy. R. astr. , 54, 221-240, 1979. Chung, W-Y. and H. Kanamori, Variation of seismic source parameters and stress drops within a descending slab and its implications mechanics, submitted to P•ys. , 1980. CARA Copyright American Geophysical Union in plate Earth Planet. , Anelasticity in the Earth the Earth data (fundamental higher modes) Geophys.

Leite, Y. K. Yu and Hermann, Attenuation of Love and Rayleigh waves across the Pacific at periods between 15 and 110 seconds, Bull. Seism. Soc. • 59, 427-444, 1969. Forsyth, D. , A new method for the analysis of multi-mode surface wave disperson' application of Love wave propagation in the East Pacific, Bull. Seism. Soc. , 65, 323-342, 1975. Gilbert, F. and A. M. Dziewonski, An application of normal mode theory to the retrieval of structure parameters and source mechanisms from seismic spectra, Phil.

These error bounds are quite realistic, though, as can be seen by comparison with other studies. The results (tabulated in Stein and Geller, 1978b) mode. 2 the error bars to provide an estimate and Jensen [1979] all fall within of the scatter in different measurements of Q-1 the for each mode. To test this, we plotted results of Sailor [1978] and Sailor and for_S 2 of is aslightly below them [1978• results morerecent study with A The data Dziewonski [1978] as well. the They are of two error (Stein bars.

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