Anisotropic structures at the base of the Earth's mantle
Article Abstract:
The D" shell at the base of the Earth's mantle is believed to be a thermal and compositional boundary layer. Its seismic anisotropy is expressed as different velocities for horizontal and vertical shear waves. An analysis of seismic phases from the Kermadec-Fiji-Tonga regions shows an area at the base of the mantle where horizontal propagating vertically polarized waves are slower than horizontally polarized waves. This is of a magnitude larger that previously thought and relates to lateral changes in shear-wave velocity.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1998
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An Indian cheetah
Article Abstract:
The seismic observation and maps of lithospheric thickness which shows connection between India's lost lithospheric roots and its exceptionally fast northward motion from about 130 million year ago is reported.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2007
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Using seismic waves to image Earth's internal structure
Article Abstract:
A new approach of using seismic waves for studying the Earth's internal structure is discussed. The findings prove that the compositional variations in the lithosphere highly affect the mantle convection.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2008
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