Finite frequency effects on global S diffracted traveltimes

Geophysical Journal International

Volumn 179, Issue 3, 2009, Pages 1645-1657

  To, Akiko ^a   Romanowicz, Barbara ^b  

^a JAPAN AGENCY FOR MARINE EARTH SCIENCE AND TECHNOLOGY   (Japan)

^b UNIVERSITY OF CALIFORNIA   (United States)

Author keywords

Body waves; Wave propagation; Wave scattering and diffraction

Indexed keywords

BODY WAVE; CORE-MANTLE BOUNDARY; DATA INVERSION; MANTLE; PHILIPPINE SEA PLATE; RAY TRACING; S-WAVE; SEISMIC TOMOGRAPHY; SEISMOGRAPH; TRAVEL TIME; WAVE DIFFRACTION; WAVE PROPAGATION; WAVE SCATTERING; WAVE VELOCITY;

ASIA; AUSTRALASIA; AUSTRALIA; CHINA; EURASIA; FAR EAST; INDIA; NORTH AMERICA; PACIFIC OCEAN; PACIFIC OCEAN (NORTHWEST); PACIFIC OCEAN (SOUTH); SOUTH ASIA;

EID: 70450205214     PISSN: 0956540X     EISSN: 1365246X     Source Type: Journal    
DOI: 10.1111/j.1365-246X.2009.04359.x     Document Type: Article

References (28)

1. Bréger L, Romanowicz B. Thermal and chemical 3-D heterogeneity in D″. Science 1998, 282:718-720.
2. Capdeville Y, To A, Romanowicz B. Coupling spectral elements and modes in a spherical earth: an extension to the 'sandwich' case. Geophys. J. Int. 2003, 154:44-57.
3. Chambers K, Woodhouse JH. Investigating the lowermost mantle using migrations of long-period. Geophys. J. Int. 2006, 166:667-678.
4. Dziewonski AM, Anderson DL. Preliminary reference earth model. Phys. Earth planet. Inter. 1981, 25:297-356.
5. Garnero EJ, McNamara AK. Structure and dynamics of Earth's lower mantle. Science 2008, 320:626-628.
6. Hung S-H, Dahlen FA, Nolet G. Wavefront healing: a banana-doughnut perspetive. Geophys. J. Int. 2001, 146:289-312.
7. Hutko AR, Lay T, Revenaugh J, Garnero EJ. Anti-correlated seismic velocity anomalies from post-perovskite in the lowermost mantle. Science 2008, 320:1070-1074.
8. Lay T, Williams Q, Garnero EJ. The core-mantle boundary layer and deep Earth dynamics. Nature 1998, 392:461-468.
9. Lekic V, Romanowicz B. Global Upper mantle radially anisotropic model developed using the spectral element method. EOS, Trans. Am. geophys. Un. 2008, 89(53). Fall Meet. Suppl., DI11A-04
10. Li XD, Romanowicz B. Comparing of global waveform inversions with and without considering cross-branch modal coupling. Geophys. J. Int. 1995, 121:695-709.
11. Li XD, Romanowicz B. Global mantle shear velocity model developed using nonlinear asymptotic coupling theory. J. geophys. Res. 1996, 101:11 245-22 271.
12. He Y, Wen L, Zheng T. Geographic boundary and shear velocity structure of the 'Pacific anomaly' near the core-mantle boundary beneath western Pacific. Earth planet. Sci. Lett. 2006, 244:302-314.
13. He Y, Wen L. Structural features and shear-velocity structure of the 'Pacific Anomaly'. J. geophys. Res. 2009, 114:B02309. doi
14. Kennett BLN, Gudmundsson O. Ellipticity corrections for seismic phases. Geophys. J. Int. 1996, 127:40-48.
15. Ni S, Helmberger DV, Tromp J. 3D Structure of the African super plume from waveform modeling. Geophys. J. Int. 2005, 161:283-294.
16. Mégnin C, Romanowicz B. The three-dimensional shear velocity structure of the mantle from the inversion of body, surface and higher-mode waveforms. Geophys. J. Int. 2000, 143:709-728.
17. Nolet G. Seismic Tomography: With Applications in Global Seismology and Exploration Geophysics 1987, D. Reidel Publishing Co., Dordrecht, Holland
18. Nolet G. Partitioned wave-form inversion and 2-dimensional structure under the network of autonomously recording seismographs. J. geophys. Res. 1990, 95:8499-8512.
19. Okal EA, Geller RJ. Shear-wave velocity at the base of the mantle from profiles of diffracted SH waves. Bull. seism. Soc. Am. 1979, 69:1039-1053.
20. Romanowicz B. Multiplet-multiplet coupling due to lateral heterogeneity: asymptotic effects on the amplitude and frequency of the earth's normal modes. Geophys. J. R. astr. Soc. 1987, 90:75-100.
21. Tape C, Liu Q, Tromp J. Finite-frequency tomography using adjoint methods. Methodology and examples using membrane surface waves. Geophys. J. Int. 2007, 168:1105-1129.
22. Thomas C, Kendall MJ, Lowman J. Lower mantle seismic discontinuities and the thermal morphology of subducted slabs. Earth planet. Sci. Lett. 2004, 225:105-113.
23. To A, Romanowicz B, Capdeville Y, Takeuchi N. 3D effects of sharp boundaries at the borders of the African and Pacific Superplumes: observation and modeling. Earth planet. Sci. Lett. 2005, 233:137-153.
24. To A, Fukao Y. Seismic velocity anomalies in the D″ layer beneath Hawaii. EOS, Trans. Am. geophys. Un. 2007, 88(52). Fall Meet. Suppl., Abstract S14A-03
25. Wen L. Seismic evidence for a rapidly varying compositional anomaly at the base of the Earth's mantle beneath the Indian Ocean. Earth planet. Sci. Lett. 2001, 194:83-95.
26. Wen L, Silver P, James D, Kuehnel R. Seismic evidence for a thermo-chemical boundary layer at the base of the Earth's mantle. Earth planet. Sci. Lett. 2001, 189:141-153.
27. Wen L. An SH hybrid method and shear velocity structures in the lowermost mantle beneath the central Pacific and South Atlantic oceans. J. geophys. Res. 2002, 107. doi
28. Woodhouse JH, Dziewonski AM. Mapping the upper mantle; three-dimensional modeling of Earth structure by inversion of seismic waveforms. J. geophys. Res. 1984, 89:5953-5986.