Slow differential rotation of the Earth's inner core indicated by temporal changes in scattering

Nature

Volumn 405, Issue 6785, 2000, Pages 445-448

  Vldale, John E ^a,b   Dodge, Doug A ^c   Earle, Paul S ^a  

^a UNIVERSITY OF CALIFORNIA   (United States)

^b UNIVERSITY OF CALIFORNIA   (United States)

^c LAWRENCE LIVERMORE NATIONAL LABORATORY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

CORE (PLANETARY); EARTH ROTATION; GEOMAGNETIC FIELD; SEISMIC WAVE; WAVE SCATTERING;

ARTICLE; EARTHQUAKE; ENERGY; GEOLOGY; OSCILLATION; PHYSICS; PRIORITY JOURNAL; ROTATION; TOPOGRAPHY;

EID: 0034713255     PISSN: 00280836     EISSN: None     Source Type: Journal    
DOI: 10.1038/35013039     Document Type: Article

References (20)

1. Song, X. D. & Richards, P. G. Seismological evidence for differential rotation of the Earth's inner core. Nature 382, 221-224 (1996).
2. Glatzmaier, G. A. & Roberts, P. H. A three-dimensional self-consistent computer simulation of a geomagnetic field reversal. Nature 377, 203-209 (1995).
3. Kuang, W. L. & Bloxham, J. An earthlike numerical dynamo model. Nature 389, 371-374 (1997).
4. Song, X. Joint inversion for inner core rotation, inner core anisotropy, and mantle heterogeneity, J. Geophys. Res. 105, 7931-7944 (2000).
5. Creager, K. C. Inner core rotation rate from small-scale heterogeneity and time-varying travel times. Science 278, 1284-1288 (1997).
6. Song, X. & Li, A. Support for differential inner core superrotation from earthquakes in Alaska recorded at South Pole station. J. Geophys. Res. 105, 623-630 (2000).
7. Poupinet, G., Souriau, A. & Coutant, O. The existence of an inner core super-rotation questioned by teleseismic doublets. Phys. Earth Planet. Inter. 118, 77-88 (2000).
8. Breger, L. & Romanowicz, B. Three-dimensional structure at the base of the mantle beneath the central Pacific. Science 282, 718-720 (1998).
9. Souriau, A., Roudil, P. & Moynot, B. Inner core differential rotation: Facts and artefacts. Geophys. Res. Lett. 24, 2103-2106 (1997).
10. Laske, G. & Masters, T. G. Rotation of the inner core from a new analysis of free oscillations. Nature 402, 3397-3400 (1999).
11. Buffett, B. A. Geodynamic estimates of the viscosity of the Earth's inner core. Nature 388, 571-573 (1997).
12. Vidale, J. E. & Earle, P. S. Fine-scale heterogeneity in the Earth's inner core. Nature 404, 273-275 (2000).
13. Green, P. E., Frosch, R. A. & Romney, C. F. Principles of an experimental large aperture seismic array (LASA). Proc. IEEE 53, 1821-1833 (1965).
14. Capon, J. Analysis of Rayleigh-wave multipath at LASA. Bull. Seismol. Soc. Am. 60, 1701-1731 (1970).
15. Marshall, P. D., Porter, D., Young, J. B. & Peachall, P. A. Atomic Weapons Establishment Report O 2/94 (Her Majesty's Stationery Office, London, 1994).
16. Engdahl, E. R. & Felix, C. P. Nature of travel-time anomalies at Lasa. J. Geophys. Res. 76, 2706-2715 (1971).
17. Haddon, R. A. W., Husebye, E. S. & King, D. W. Origin of precursors to P'P'. Phys. Earth Planet. Inter. 14, 41-70 (1977).
18. Earle, P. S. & Shearer, P. M. Observations of high-frequency scattered energy associated with the core phase PKKP. Geophys. Res. Lett. 25, 405-408 (1998).
19. Bhattacharyya, J., Shearer, P. M. & Masters, T. G. Inner core attenuation from short period PKP(BC) versus PKP(DF) waveforms. Geophys. J. Int. 114, 1-11 (1993).
20. Dziewonski, A. M. & Anderson, D. L. Preliminary reference Earth model. Phys. Earth Planet. Inter. 25, 297-356 (1981).