Evidence for inner-core rotation from possible changes with time in PKP coda

Geophysical Research Letters

Volumn 32, Issue 1, 2005, Pages 1-4

  Vidale, John E ^a,b   Earle, Paul S ^a  

^a UNIVERSITY OF CALIFORNIA   (United States)

^b UNIVERSITY OF CALIFORNIA   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

ARRAYS; MECHANICAL WAVES; NUCLEAR EXPLOSIONS; ROTATION; WAVE EFFECTS;

CORE ROTATION; NORSAR SUBARRAYS; PKP ENERGY;

GEOPHYSICS;

INNER CORE; ROTATION; SEISMIC DATA; TEMPORAL VARIATION;

EID: 16344381785     PISSN: 00948276     EISSN: None     Source Type: Journal    
DOI: 10.1029/2004GL021240     Document Type: Article

References (31)

1. Aurnou, J., and P. Olson (2000), Control of inner core rotation by electromagnetic, gravitational and mechanical torques, Phys. Earth Planet. Inter., 117 (1-4), 111-121.
2. Buffett, B. A. (1997), Geodynamic estimates of the viscosity of the Earth's inner core, Nature, 388, 571-573.
3. Buffett, B. A., and G. A. Glatzmaier (2000), Gravitational braking of innercore rotation in geodynamo simulations, Geophys. Res. Lett., 27 19), 3125-3128.
4. Bungum, H., E. S. Husebye, and F. Ringdahl (1971), The NORSAR array and preliminary results of data analysis, Geophys. J. R. Astron. Soc., 25 115-126.
5. Creager, K. C. (1997), Inner core rotation rate from small-scale heterogeneity and time-varying travel times, Science, 278, 1284-1288.
6. Crusem, R., and Y. Caristan (1992), Moment tensor inversion, yield estimation, and seismic coupling variability at the French Centre D'Experimentation du Pacific, Bull. Seismol. Soc. Am., 82, 1253-1274.
7. Doornbos, D. J. (1974), The anelasticity of the inner core, Geophys. J. R. Astron. Soc., 38, 397-415.
8. Douglas, A., P. D. Marshall, and J. B. Young (1993), Body-wave magnitudes and locations of French explosions in the South Pacific, pp. 21, U.K. At. Weapons Estab., London.
9. Glatzmaier, G. A., and P. H. Roberts (1996), A three-dimensional self-consistent computer simulation of a geomagnetic field reversal, Nature, 377, 203-209.
10. Haddon, R. A., and J. R. Cleary (1974), Evidence for scattering of seismic PKP waves near the core-mantle boundary, Phys. Earth Planet. Inter., 8, 211-234.
11. Houard, S., J. L. Plantet, J. P. Massot, and H. C. Nataf (1993), Amplitude of core waves near the PKP caustic, from nuclear explosions in the South Pacific recorded at the "Laboratoire de détection et géophysique" network, in France, Bull. Seismol. Soc. Am., 83, 1835-1854.
12. Jost, M. L., J. Schweitzer, and H.-P. Harjes (1996), Monitoring nuclear tests with GERESS, Bull. Seismol. Soc. Am., 86, 172-190.
13. Koper, K. D., J. M. Franks, and M. Dombrovskaya (2005), Small-scale heterogeneity in Earth's inner core from observations of PKiKP coda waves, Earth Planet. Sci. Lett., in press.
14. Kuang, W. L., and J. Bloxham (1997), An earthlike numerical dynamo model, Nature, 389, 371-374.
15. Laske, G., and T. G. Masters (1999), Rotation of the inner core from a new analysis of free oscillations, Nature, 402, 3397-3400.
16. Laske, G., and T. G. Masters (2003), The Earth's free oscillations and the differential rotation of the inner core, in Earth's Core: Dynamics, Structure, Rotation, Geodyn. Ser., vol. 31, edited by V. Dehant et al., AGU, Washington, D. C.
17. Li, A. Y., and P. G. Richards (2003), Using earthquake doublets to study inner core rotation and seismicity catalog precision, Geochem. Geophys. Geosyst., 4(9), 1072, doi:10.1029/2002GC000379.
18. Li, Y. G., J. E. Vidale, S. M. Day, D. D. Oglesby, and E. Cochran (2003), Postseismic fault healing on the rupture zone of the 1999 M 7.1 Hector Mine, California, earthquake, Bull. Seismol. Soc. Am., 93 2), 854-869.
19. Niu, F. L., P. G. Silver, R. M. Nadeau, and T. V. McEvilly (2003), Migration of seismic scatterers associated with the 1993 Parkfield aseismic transient event, Nature, 426(6966), 544-548.
20. Schaff, D. P., and G. C. Beroza (1998), Postseismic response of repeating aftershocks, Geophys. Res. Lett., 25, 4549-4552.
21. Song, X. (2000), Joint inversion for inner core rotation, inner core anisotropy, and mantle heterogeneity, J. Geophys. Res., 105(B4), 7931-7943.
22. Song, X., and D. V. Helmberger (1992), Velocity structure near the inner core boundary from waveform modeling, J. Geophys. Res., 97, 6573-6586.
23. Song, X., and D. V. Helmberger (1995), A P wave velocity model of the Earth's core, J. Geophys. Res., 100, 9817-9830.
24. Song, X., and D. V. Helmberger (1998), Seismic evidence for an inner core transition zone, Science, 282, 924-927.
25. Song, X., and P. G. Richards (1996), Seismological evidence for the differential rotation of the Earth's inner core, Nature, 382, 221-224.
26. Song, X., and X. X. Xu (2002), Inner core transition zone and anomalous PKP (DF) waveforms from polar paths, Geophys. Res. Lett., 29(4), 1042, doi:10.1029/2001GL013822.
27. Souriau, A., R. Garcia, and G. Poupinet (2003), The seismological picture of the inner core: Structure and rotation, Comptes Rendus Geosci., 335(1), 51-63.
28. Vidale, J. E., and P. S. Earle (2000), Fine-scale heterogeneity in the Earth's inner core, Nature, 404(6775), 273-275.
29. Vidale, J. E., and M. A. H. Hedlin (1998), Evidence for partial melt at the core-mantle boundary north Tonga from the strong scattering of seismic waves, Nature, 391(6668), 682-685.
30. Vidale, J. E., D. A. Dodge, and P. S. Earle (2000), Slow differential rotation of the Earth's inner core indicated by temporal changes in scattering, Nature, 405(6785), 445-448.
31. Xu, X. X., and X. D. Song (2003), Evidence for inner core super-rotation from time-dependent differential PKP traveltimes observed at Beijing Seismic Network, Geophys. J. Int., 152(3), 509-514.