scholarly journals Bayesian Joint Inversion Implies a Complex Multiscale Lowermost Mantle Overlaying Simple Core-Mantle Boundary Topography

2021 ◽  
Author(s):  
Jack Muir ◽  
Hrvoje Tkalčić ◽  
Satoru Tanaka
Keyword(s):  
Joint Inversion ◽  
Mantle Boundary ◽  
Core Mantle Boundary ◽  
Lowermost Mantle

Investigation of core–mantle boundary topography and lowermost mantle with P4KP waves

2015 ◽  
Vol 204 (2) ◽  
pp. 1060-1071 ◽  
Author(s):  
David Schlaphorst ◽  
Christine Thomas ◽  
Richard Holme ◽  
Rafael Abreu
Keyword(s):  
Mantle Boundary ◽  
Core Mantle Boundary ◽  
Lowermost Mantle

scholarly journals Imaging the lowermost mantle (D″) and the core-mantle boundary withSKKScoda waves

2008 ◽  
Vol 175 (1) ◽  
pp. 103-115 ◽  
Author(s):  
Ping Wang ◽  
Maarten V. de Hoop ◽  
Robert D. van der Hilst
Keyword(s):  
Mantle Boundary ◽  
Core Mantle Boundary ◽  
The Core ◽  
Lowermost Mantle

The origin of short-period precursors to PKP

1975 ◽  
Vol 65 (3) ◽  
pp. 765-786
Author(s):  
C. Wright
Keyword(s):  
Wave Energy ◽  
Wave Train ◽  
Outer Core ◽  
Temporal Changes ◽  
P Wave ◽  
Mantle Boundary ◽  
Core Mantle Boundary ◽  
The Core ◽  
Short Period ◽  
Lowermost Mantle

abstract An investigation of the origin of precursors to short-period PKP phases has been undertaken using 23 earthquakes recorded at the Yellowknife Array at distances between 123° and 143°. In particular, the pattern of slowness and azimuth changes with time has been examined for coherent bursts of energy occurring throughout the precursor wave train. These temporal changes demonstrate that the precursor energy is most satisfactorily explained by scattering from small inhomogeneities at the core-mantle boundary or in the lowermost mantle, both before P-wave energy enters the core and when it re-emerges into the mantle. Moreover, scattering before entry into the core seems to generate the larger amplitudes. The bulk of the data cannot be attributed to reflection or sharp upward refraction from velocity discontinuities within the lower part of the outer core, although there is some ambiguous evidence for a reflecting interface at a depth of about 4850 km.

scholarly journals Tomography of core-mantle boundary and lowermost mantle coupled by geodynamics

2012 ◽  
Vol 189 (2) ◽  
pp. 730-746 ◽  
Author(s):  
Gaia Soldati ◽  
Lapo Boschi ◽  
Alessandro M. Forte
Keyword(s):  
Mantle Boundary ◽  
Core Mantle Boundary ◽  
Lowermost Mantle

scholarly journals Observations of core-mantle boundary Stoneley modes

2013 ◽  
Vol 40 (11) ◽  
pp. 2557-2561 ◽  
Author(s):  
Paula Koelemeijer ◽  
Arwen Deuss ◽  
Jeroen Ritsema
Keyword(s):  
Mantle Boundary ◽  
Core Mantle Boundary
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