EVIDENCE FOR PROPORTIONALITY OF P AND S HETEROGENEITY IN THE LOWER MANTLE
To date, most shear-velocity heterogeneity models in the lower mantle have been derived using long-period data. Comparatively little use has been made of the vast International Seismological Centre (ISC) data base of shear-wave arrival times. The aim of this study is to use the ISC P and S arrival t...
| 主要な著者: | , |
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| フォーマット: | Journal article |
| 出版事項: |
1995
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| 要約: | To date, most shear-velocity heterogeneity models in the lower mantle have been derived using long-period data. Comparatively little use has been made of the vast International Seismological Centre (ISC) data base of shear-wave arrival times. The aim of this study is to use the ISC P and S arrival times to construct global models of P and S heterogeneity in the lower mantle, and then to compare them in order to investigate whether, within the limitations of the data distributions, they might be proportional. The advantages of constructing both compressional- and shear-wave models from the one data set is that they share similar resolution properties, and hence are most reliable in the same areas. -from Authors |
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