| Abstract: | Considers a spherically symmetric, non-rotating Earth consisting of an isotropic, perfect elastic material where the density and the S-wave velocity may have one or two discontinuities in the upper mantle. Shows that given the velocity throughout the mantle and the crust and given the density in the lower mantle, then the freqencies of the torsional oscillations of one angular order (one torsional spectrum), determine the density in the upper mantle and in the crust uniquely. If the velocity is known only in the lower mantle, then the frequencies of the torsional oscillations of two angular orders uniquely determine both the density and the velocity in the upper mantle and in the crust. In particular, the position and size of the discontinuities in the density and velocity are uniquely determined by two torsional spectra.-Author |
| Genre: | Article |
| ProdID: | 70013387 |
| Citation Author: | Willis, C. |
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| Citation End Page: | 853 |
| Citation Issue: | 3 |
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| Citation Language: | English |
| Citation Larger Work Title: | Geophysical Journal of the Royal Astronomical Society |
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| Citation Number Of Pages: | 7 |
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| Citation Publisher: | Wiley |
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| Citation Search Results Text: | Inverse problems for torsional modes.; 1984; Article; Journal; Geophysical Journal of the Royal Astronomical Society; Willis, C. |
| Citation Start Page: | 847 |
| Citation Volume: | 78 |
| Citation Year: | 1984 |
| Type: | citation/reference |
| Text: | Inverse problems for torsional modes.; 1984; Article; Journal; Geophysical Journal of the Royal Astronomical Society; Willis, C. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (DIGITAL OBJECT IDENTIFIER): | http://dx.doi.org/10.1111/j.1365-246X.1984.tb05074.x |
| Date Other: | Sun, 1 Jan 1984 00:00 -0600 |
| Publisher: | Wiley |
