High-resolution, two-dimensional vertical tomography of the central Pacific mantle using ScS reverberations and frequency-dependent travel times

Journal of Geophysical Research: Solid Earth

Volumn 103, Issue 8, 1998, Pages 17933-17971

  Katzman, Rafael ^a   Zhao, Li ^a   Jordan, Thomas H ^a  

^a MASSACHUSETTS INSTITUTE OF TECHNOLOGY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

MANTLE STRUCTURE; SEISMIC TOMOGRAPHY; VELOCITY STRUCTURE;

PACIFIC OCEAN;

EID: 0032504742     PISSN: 21699313     EISSN: 21699356     Source Type: Journal    
DOI: 10.1029/98jb00504     Document Type: Article

References (143)

1. Backus, G. E., and F. Gilbert, Numerical application of a formalism for geophysical inverse problems, Geophys. J. R. Astron. Soc., 13, 247-276, 1967.
2. Baudry, N., and L. Kroenke, Intermediate-wavelength (400-600 km), south Pacific geoidal undulations: Their relationship to linear volcanic chains, Earth Planet. Sci. Lett., 102, 430-443, 1991.
3. Bina, C., and G. Helffrich, Phase transition Clapeyron slopes and transition zone seismic discontinuity topography, J. Geophys. Res., 99, 15,853-15,860, 1994.
4. Butler, R., The 1973 Hawaii earthquake: A double earthquake beneath the volcano Mauna Kea, Geophys. J. R. Astron. Soc., 69, 173-186, 1982.
5. Calmant, S., The elastic thickness of the lithosphere in the Pacific Ocean, Earth Planet. Sci. Lett., 85, 277-288, 1987.
6. Cara, M., and J. J. Lévêque, Anisotropy of the asthenosphere: The higher mode data of the Pacific revisited, Geophys. Res. Left., 15, 205-208, 1988.
7. Cazenave, A., S. Houry, and K. Dominh, Geosat-derived geoid anomalies at medium wavelengths, J. Geophys. Res., 97, 7081-7095, 1992.
8. Cazenave, A., B. Parsons, and P. Calcagno, Geoid lineations of 1000 km wavelength over the central Pacific, Geophys. Res. Lett., 22, 97-100, 1995.
9. Cazenave, A., P. Schaeffer, M. Berge, C. Brossier, K. Dominh, and M. C. Gennero, High-resolution mean sea surface computed with data of ERS-I (geodetic mission) and the TOPEX-POSEIDON, Geophys. J. Int., 125, 696-704, 1996.
10. Červený, V., and J. E. P. Soares, Fresnel volume ray tracing, Geophysics, 57, 902-915, 1992.
11. Creager, K. C., and T. H. Jordan, Slab penetration into the lower mantle beneath the Mariana and other island arcs of the northwest Pacific, J. Geophys. Res., 91, 3573-3589, 1986.
12. Crough, S. T., Hotspot swells, Annu. Rev. Earth Planet. Sci, 11, 165-193, 1983.
13. Crough, S. T., and R. D. Jarrard, The Marquesas-Line swell, J. Geophys. Res., 86, 11,763-11,771, 1981.
14. Davies, G. F., and F. Pribac, Mesozoic seafloor subsidence and the Darwin Rise, past and present, in The Mesozoic Pacific: Geology, Tectonics, and Volcanism, Geophys. Monogr., Ser., vol. 77, edited by M. S. Pringle et al., pp. 39-52, AGU, Washington, D.C., 1993.
15. Detrick, R. S., and S. T. Crough, Island subsidence, hot spots, and lithospheric thinning, J. Geophys. Res., 83, 1236-1244, 1978.
16. Dziewonski, A. M., and D. L. Anderson, Preliminary reference Earth model, Phys. Earth Plant. Inter., 25, 297-356, 1981.
17. Dziewonski, A. M., G. A. Ekström, and X.-F. Liu, Structure at the top and bottom of the mantle, in Monitoring a Comprehensive Test Ban Treaty, edited by E. S. Husebye and A. M. Dainty, pp. 521-550, Kluwer Acad., Norwell, Mass., 1996.
18. Ekström, G. Á., and A. M. Dziewonski, The unique anisotropy of the Pacific upper mantle, Nature, in press, 1998.
19. Fischer, K. M., K. C. Creager, and T. H. Jordan, Mapping the Tonga slab, J. Geophys. Res., 96, 14,403-14,427, 1991.
20. Flanagan, M. P., and P. M. Shearer, Global mapping of topography on transition zone velocity discontinuities by stacking SS precursors, J. Geophys. Res., 103, 2673-2692, 1998.
21. Forsyth, D. W., The early structural evolution and anisotropy of the oceanic upper mantle, Geophys. J. R. Astron. Soc., 43, 103-162, 1975.
22. Forte, A. M., A. M. Dziewonski, and R. L. Woodward, Aspherical structure of the mantle, tectonic plate motions, nonhydrostatic geoid, and topography of the core-mantle boundary, in Dynamics of Earth's Deep Interior and Earth Rotation, Geophys. Monogr. Ser., vol. 72, edited by J.-L. Le Mouel, D. E. Smylie, and T. Herring, pp. 135-166, 1993.
23. Gaherty, J. B., and T. H. Jordan, Lehmann discontinuity as the base of an anisotropic layer beneath continents, Science, 268, 1468-1471, 1995.
24. Gaherty, J. B., T. H. Jordan, and L. S. Gee, Seismic structure of the upper mantle in a western Pacific corridor, J. Geophys. Res., 101, 22,291-22,309, 1996.
25. Garnero, E. J., and D. V. Helmberger, Seismic detection of a thin laterally varying layer at the base of the mantle beneath the central-Pacific, Geophys. Res. Lett., 23, 977-980, 1996.
26. Gee, L. S., and T. H. Jordan, Generalized seismological data functionals, Geophys. J. Int., 111, 363-390, 1992.
27. Gee, L. S., and B. Romanowicz, Attenuation and differential travel times in the western Pacific, Eos, Trans. AGU, 73(43), Fall Meet. Suppl., 384, 1992.
28. Gilbert, F., and D. V. Helmberger, Generalized ray theory for a layered sphere, Philos. Trans. R. Soc. London, Ser. A, 278, 187-269, 1972.
29. Grand, S. P., Tomographic inversion for shear velocity beneath the North American plate, J. Geophys. Res., 92, 14,065-14,090, 1987.
30. Grand, S. P., Mantle shear structure beneath the Americas and surrounding oceans, J. Geophys. Res., 99, 11,591-11,621, 1994.
31. Grand, S. P., and D. V. Helmberger, Upper mantle shear structure of North America, Geophys. J. R. Astron. Soc., 76, 399-438, 1984.
32. Grand, S. P., R. van der Hilst, and S. Widiyantoro, Global seismic tomography: A snapshot of convection in the Earth, GSA Today, 7, 1-7, 1997.
33. Green, D. H., and R. C. Liberman, Phase equilibria and elastic properties of a pyrolite model for the oceanic upper mantle, Tectonophysics, 32, 61-92, 1976.
34. Gripp, A. E., and R. G. Gordon, Current plate velocities relative to the hotspots incorporating the NUVEL-1 global plate motion model, Geophys. Res. Lett., 17, 1109-1112, 1990.
35. Hager, B. H., Subducted slabs and the geoid: Constrains on mantle rheology and flow, J. Geophys. Res., 89, 6003-6015, 1984.
36. Hager, B. H., Mantle viscosity: A comparison of models from postglacial rebound and from geoid, plate driving forces, and advected heat flux, in Glacial Isosrasy, Sea Level and Mantle Rheolofty, edited by R. Sabadini, K. Lambeck, and E. Boschi, pp. 493-513, Kluwer Acad., Norwell, Mass., 1991.
37. Hager, B. H., and R. W. Clayton, Constraints on the structure of mantle convection using seismic observations, flow models, and the geoid, in Mantle Convection: Plate Tectonics and Global Dynamics, edited by W. R. Pettier, pp. 658-763, Gordon and Breach, Newark, N.J., 1989.
38. Hager, B. H., and M. A. Richards, Long-wavelength variations in Earth's geoid: Physical models and dynamical implications, Philos. Trans. R. Soc. London, Ser. A, 328, 309-327, 1989.
39. Haxby, W. F., and J. K. Weissel, Evidence for small-scale mantle convection from Seasat altimeter data, J. Geophys. Res., 91, 3507-3520, 1986.
40. Helmberger, D. V., Theory and application of synthetic seismograms, in Earthquakes: Observation, Theory, and Interpretation, edited by H. Kanamori and E. Boschi, pp. 174-217, North-Holland, New York, 1983.
41. Helmberger, D. V., and R. A. Wiggins. Upper-mantle structure of midwestern united states, J. Geophys. Res., 76, 3229-3245, 1971.
42. Honda, S., D. A. Yuen, S. Balachandar, and D. Reuteler, Three-dimensional instabilities of mantle convection with multiple phase transition, Science, 259, 1308-1311, 1993.
43. Hong, T.-L., and D. V. Helmberger, Glorified optics and wave propagation in nonplanar structure, Bull. Seismol. Soc. Am., 68, 1313-1358, 1978.
44. Houseman, G., and D. P. McKenzie, Numerical experiments on the onset of convective instabilities in the Earth's mantle, Geophys. J. R. Astron. Soc., 68, 133-164, 1982.
45. Hron, F., Criteria for selection of phases in synthetic seismograms for layered media. Bull. Seismol. Soc. Am., 61, 765-779, 1971.
46. Hron, F., Numerical method for ray generation in multilayered media, Methods Comput. Phys., 12, 1-34, 1972.
47. Jordan, T. H., Mineralogies, densities and seismic velocities of garnet Iherzolites and their geophysical implications, in Mantle Sample: Inclusions in Kimberlites and Other Volcanics, edited by F. R. Boyd and H. O. A. Meyer, pp. 1-13, AGU, Washington, D.C., 1979,
48. Jordan, T. H., and S. A. Sipkin, Estimation of the attenuation operator for multiple ScS waves, Geophys. Res. Lett., 4, 167-170, 1977.
49. Karato, S., Importance of anelasticity in the interpretation of seismic tomography, Geophys. Res. Lett., 20, 1623-1626, 1993.
50. Karato, S.-I., Effects of water on seismic wave velocities in the upper mantle, Proc: Jpn. Acad., Ser. B, 71, 61-66, 1995.
51. Kato, M., An analysis of the temperature derivative of shear-wave velocity in the oceanic lithosphere of the Pacific Basin, J. Phys. Earth., 45, 67-71, 1997.
52. Katzman, R., L. Zhao, and T. H. Jordan, Image of small-scale convection in the Pacific upper mantle: Implications for the Hawaii, Marquesas and Society hotspots, Eos Trans. AGU, 78(17), Spring Meet. Suppl., S322, 1997.
53. Kawasaki, I., and F. Kon'no, Azimuthal anisotropy of surface waves and the possible type of the seismic anisotropy due to preferred orientation of olivine in the uppermost mantle beneath the Pacific Ocean, J. Phys. Earth, 32, 229-244, 1984.
54. Lay, T., and T. C. Wallace, Multiple ScS travel times and attenuation beneath Mexico and Central America, Geophys. Res. Lett., 10, 301-304, 1983.
55. Lemoine, F. G., et al., The NASA and DMA Joint Geopotential Model, Eos Trans. AGU, 77(46), Fall Meet. Suppl., F136, 1996.
56. Lerner-Lam, A., and T. H. Jordan, Earth structure from fundamental and higher-mode waveform analysis, Geophys. J. R. Astron. Soc, 75, 759-797, 1983.
57. Li, X.-D., and B. Romanowicz, Comparison of global waveform inversions with and without considering cross-branch model coupling, Geophys. J. Int., 121, 695-709, 1995.
58. Li, X.-D., and B. Romanowicz, Global mantle shear velocity model developed using nonlinear asymptotic coupling theory, J. Geophys. Res., 101, 22,245-22,272, 1996.
59. Li, X.-D., and T. Tanimoto, Waveforms of long-period waves in a slightly aspherical earth model, Geophys. J. Int., 112, 92-102, 1993.
60. Liu, M., and C. G. Chase, Evolution of Hawaiian basalts: A holspot melting model, Earth Planet. Sci. Lett., 104, 151-165, 1991.
61. Machetel, P., and P. Weber, Intermittent layered convection in a model mantle with an endothermic phase change at 670 km. Nature, 350, 55-57, 1991.
62. Maia, M., and M. Diament, An analysis of the altimetric geoid in various wavebands in the central Pacific Ocean: Constraints on the origin of intraplate features, Tectonophysics, 190, 133-153, 1991.
63. Marquering, H., and R. Snieder, Surface-wave mode coupling for efficient forward modeling and inversion of body-wave phases, Geophys. J. Int., 120, 186-208, 1995.
64. Marquering, H., R. Snieder, and G. Nolet, Waveform inversions and the significance of surface-wave mode coupling, Geophys. J. Int., 124, 258-278, 1996.
65. Masters, G., S. Johnson, G. Laske, and H. Bolton, A shear velocity model of the mantle, Philos. Trans. R. Soc. London, Ser. A, 354, 1385-1411, 1996.
66. Maupin, V., Partial derivatives of surface-wave phase velocities for flat anisotropic models, Geophys. J. R. Astron. SoC., 83, 379-398, 1985.
67. McKenzie, D., A. Watts, B. Parsons, and M. Roufosse, Platform of mantle convection beneath the Pacific Ocean, Nature, 288, 442-446, 1980.
68. Menard, H. W., Darwin reprise, J. Geophys. Res., 89, 9960-9968, 1984.
69. Montagner, J.-P., and T. Tanimoto, Global upper mantle tomography of seismic velocities and anisotropy, J. Geophys. Res., 96, 20,337-20,351, 1991.
70. Morgan, W. J., Deep mantle convection plumes and plate motion, Am. Assoc. Pet. Geol. Bull., 56, 203-213, 1972.
71. Mueller, R. D., W. R. Roest, J.-Y. Royer, L. M. Gahagan, and J. G. Sclater, A digital age map of the ocean floor, SIO Ref. Ser., 93-30, 1993.
72. Nakanishi, I., Attenuation of multiple ScS beneath the Japanese arc, Phys. Earth. Planet. Inter., 19, 337-347, 1979.
73. Nicolas, A., and N. I. Christensen, Formation of anisotropy in upper mantle peridotites: A review, in Composition, Structure, and Dynamics of Lithosphere-Asthenosphere System, Geodyn. Ser., vol. 16, edited by K. Fuchs and C. Froide vaux, pp. 111-123, AGU, Washington, D.C., 1987.
74. Nishimura, C. E., and D. W. Forsyth, The anisotropic structure of the upper mantle in the Pacific, Geophys. J. Int., 96, 203-229, 1989.
75. Nolet, G., Partitioned waveform inversion and two-dimensional structure under the network of autonomously recording seismographs, J. Geophys. Res., 95, 8499-8512, 1990.
76. Nolet, G., S. P. Grand, and B. L. N. Kennett, Seismic heterogeneity in the upper mantle, J. Geophys. Res., 99, 23,753-23,766, 1994.
77. O'Hara, M. J., Is there an Icelandic mantle plume?, Nature, 253, 708-710, 1975.
78. Panasyuk, S. V., B. H. Hager, and A. M. Forte, Understanding the effects of mantle compressibility on geoid kernels, Geophys. J. Int., 124, 121-133, 1996.
79. Parsons, B., and D. McKenzie, Mantle convection and the thermal structure of the plates, J. Geophys. Res., 83, 4485-4496, 1978.
80. Pavlis, G. L., and J. R. Booker, The mixed discrete-continuous inverse problem: Application to the simultaneous determination of earthquake hypocenters and velocity structure, J. Geophys. Res., 85, 4801-4810, 1980.
81. Phipps Morgan, J., and P. Shearer, Seismic constraints on mantle flow and topography of the 660-km discontinuity: Evidence for whole mantle convection, Nature, 365, 506-511, 1993.
82. Phipps Morgan, J., W. J. Morgan, and E. Price, Hotspots melting generates both hotspot volcanism and hotspot swell, J. Geophys. Res., 100, 8045-8062, 1995.
83. Puster, P., and T. H. Jordan, How stratified is mantle convection?, J. Geophys. Res., 102, 7625-7646, 1997.
84. Puster, P., J. B. Gaherty, T. H. Jordan, and D. J. Weidner, Fine-scale structure of the 660-km discontinuity region, Eos Trans. AGU, 77(46), Fall Meet. Suppl., F472, 1996.
85. Regan, J., and D. L. Anderson, Anisotropy models of the upper mantle, Phys. Earth Plant. Inter., 35, 227-263, 1984.
86. Revenaugh, J., and T. H. Jordan, Observations of first-order mantle reverberations. Bull. Seism. Soc. Am., 77, 1704-1717, 1987.
87. Revenaugh, J., and T. H. Jordan, A study of mantle layering beneath the western Pacific, J. Geophys. Res., 94, 5787-5813, 1989.
88. Revenaugh, J., and T. H. Jordan, Mantle layering from ScS reverberations, 1, Waveform inversion of zeroth-order reverberations, J. Geophys. Res., 96, 19,749-19,762, 1991a.
89. Revenaugh, J., and T. H. Jordan, Mantle layering from ScS reverberations, 2, The transition zone, J. Geophys. Res., 96, 19,763-19,780, 1991b.
90. Revenaugh, J., and T. H. Jordan, Mantle layering from ScS reverberations, 3, The upper mantle, J. Geophys. Res., 96, 19,781-19,810, 1991c.
91. Revenaugh, J., and T. H. Jordan, Mantle layering from ScS reverberations, 4, The lower mantle and core-mantle boundary, J. Geophys. Res., 96, 19,781-19,810, 1991d.
92. Revenaugh, J., and S. A. Sipkin, Mantle discontinuity structure beneath China, J. Geophys. Res., 99, 21,911-21,927, 1994a.
93. Revenaugh, J., and S. A. Sipkin, Seismic evidence for silicate melt atop the 410-km mantle discontinuity, Nature, 369, 474-476, 1994b.
94. Ribe, M. N., Seismic anisotropy and mantle flow, J. Geophys. Res., 94, 4213-4223, 1989.
95. Richards, M. A., B. H. Hager, and N. H. Sleep, Dynamically supported geoid highs over hotspots: Observation and theory, J. Geophys. Res., 93, 7690-7708, 1988.
96. Richter, F., Convection and large-scale circulation of the mantle, J. Geophys. Res., 78, 8735-8745, 1973.
97. Richter, F., Focal mechanism and seismic energy release of deep and intermediate earthquakes in the Tonga-Kermadec region and their bearing on the depth extent of mantle flow, J. Geophys. Res., 84, 6783-6795, 1979.
98. Richter, F., and B. Parsons, On the interaction of two scales of convection in the mantle, J. Geophys. Res., 80, 2529-2541, 1975.
99. Ringwood, A. E., Composition and Petrology of the Earth's Mantle, 604 pp., McGraw-Hill, New York, 1975.
100. Robinson, E. M., B. Parsons, and S. F. Daly, The effect of a shallow low viscosity zone on the apparent compensation of mid-plate swells, Earth Planet. Sci. Lett., 82, 335-348, 1987.
101. Sammis, C. G., J. C. Smith, G. Schubert, and D. A. Yuen, Viscosity-depth profile of the Earth's mantle: Effects of polymorphic phase transition, J. Geophys. Res., 82, 3747-3761, 1977.
102. Sandwell, D. T., and M. Renkin, Compensation of swells and plateaus in the North Pacific: No direct evidence for mantle convection, J. Geophys. Res., 93, 2775-2783, 1988.
103. Sato, H., I. S. Sacks, and T. Murase, The use of laboratory velocity for estimating temperature and partial melt fraction in the low-velocity zone: Comparison with heat flow and electrical conductivity studies, J. Geophys. Res., 94, 5689-5704, 1989.
104. Shearer, P. M., Constraints on upper mantle discontinuities from observations of long-period reflected and converted phases, J. Geophys. Res., 96, 20,353-20,364, 1991.
105. Shearer, P. M., Global mapping of upper mantle reflectors from long-period SS precursors, Geophys. J. Int., 115, 878-904, 1993.
106. Silver, P. G., Seismic anisotropy beneath continents: Probing the depths of geology, Annu. Rev. Earth Planet. Sci., 24, 385-432, 1996.
107. Sipkin, S. A., and T. H. Jordan, Lateral heterogeneity of upper mantle determined from the travel times of multiple ScS, J. Geophys. Res., 81, 6307-6320, 1976.
108. ScS Bull. Seismol. Soc. Am., 69, 1055-1079, 1979.
109. Sipkin, S. A., and T. H. Jordan, Multiple ScS travel times in the western Pacific: Implications for mantle heterogeneity, J. Geophys. Res., 85, 853-861, 1980a.
110. ScS , Bull. Seismol. Soc. Am., 70, 1071-1102, 1980b.
111. Solheim, L. P., and W. R. Peltier, Avalanche effects in phase transition modulated thermal convection: A model of Earth's mantle, J. Geophys. Res., 99, 6997-7018, 1994.
112. Spencer, C., and D. Gubbins, Travel-time inversion for simultaneous earthquake location and velocity structure determination in laterally varying media, Geophys. J. R. Astron. Soc., 63, 95-116, 1980.
113. Su, W.-J., R. L. Woodward, and A. M. Dziewonski, Degree 12 model of shear velocity heterogeneity in the mantle, J. Geophys. Res., 99, 6945-6980, 1994.
114. Tackley, P. J., D. J. Stevenson, G. A. Glatzmair, and G. Schubert, Effect of an endothermic phase transition at 670 km depth in spherical model of convection in the Earth mantle. Nature, 361, 699-703, 1993.
115. Tanimoto, T., and D. L. Anderson, Lateral heterogeneity and azimuthal anisotropy in the upper mantle: Love and Rayleigh waves 100-250 s, J. Geophys. Res., 90, 1842-1858, 1985.
116. Tarantola, A., Inverse Problems Theory, 613 pp., Elsevier, New York 1987.
117. Tarantola, A., and A. Nercessian, Three-dimensional inversion without blocks, Geophys. J. K. Astron. Soc., 76, 299-306, 1984.
118. Tarantola, A., and B. Valette, Generalized nonlinear inverse problem solved using the least squares criterion. Rev. Geophys., 20, 219-232, 1982.
119. Thatcher, W., and J. N. Brune, Higher mode interference and observed anomalous apparent Love wave phase velocities, J. Geophys. Res 74, 6603-6611, 1969.
120. Thoraval, C., P. Machetel, and A. Cazenave, Locally layered convection inferred from dynamic models of the Earth's mantle, Nature, 375, 777-780, 1995.
121. Turcotte, D. L., and G. Schubert, Geodynamics, Applications of Continental Physics to Geological Problems, 450 pp., John Wiley, New York, 1982.
122. van der Hilst, R., Complex morphology of subducted lithosphere in the mantle beneath the Tonga trench, Nature, 374, 154-157, 1995.
123. van der Hilst, R., S. Widiyantoro, and E. R. Engdahl, Evidence for deep mantle circulation from global tomography. Nature, 386, 578-584, 1997.
124. van der Lee, S., and G. Nolet, The upper-mantle S velocity structure of North America, J. Geophys. Res., 102, 22,815-22,838, 1997.
125. Vasco, D. W., J. John, E. Peterson, and E. L. Majer, Beyond ray tomography: Wavepath and Fresnel volumes, Geophysics, 60, 1790-1804, 1995.
126. Von Herzen, R. P., M. J. Cordery, R. S. Detrick, and C. Fang, Heat flow and thermal origin of hotspot swells: The Hawaiian swell revisited, J. Geophys. Res., 94, 13,783-13,799, 1989.
127. Watts, A. B., Gravity and bathymetry in the central Pacific Ocean, J. Geophys. Res., 81, 1533-1553, 1976.
128. Watts, A. B., and U. S. ten Brink, Crustal structure, flexure, and subsidence history of the Hawaiian swell, J. Geophys. Res., 94, 10,473-10,500, 1989.
129. Watts, A. B., J. H. Bodine, and N. M. Ribe, Observations of flexure and the geological evolution of the Pacific Ocean, Nature, 283, 532-537, 1980.
130. Weidner, D. J., and Y. Wang, Chemical and Clapeyron induced buoyancy at the 660-km discontinuity, J. Geophys. Res., in press, 1998.
131. Wessel, P., and W. H. F. Smith, Free software helps map and display data, Eos Trans. AGU, 72, 441, 445-446, 1991.
132. Wessel, P., D. Bercovici, and L. W. Kroenke, The possible reflection of mantle discontinuities in Pacific geoid and bathymetry, Geophys. Res. Lett., 21, 1943-1946, 1994.
133. Woodhouse, J. H., The coupling and attenuation of nearly resonant multiplets in the Earth's free oscillation spectrum, Geophys. J. R. Astron. Soc., 61, 261-283, 1980.
134. Woodhouse, J. H., The joint inversion of seismic waveforms for lateral variations in Earth structure and earthquake source parameters, Proc. Int. Seh. Phys. Enrico Fermi, 85, 366-397, 1983.
135. Woodhouse, J. H., and A. M. Dziewonski, Mapping the upper mantle: Three-dimensional modeling of Earth structure by inversion of seismic waves, J. Geophys. Res., 89, 5953-5986, 1984.
136. Woods, M. T., and E. A. Okal, Rayleigh-wave dispersion along the Hawaiian swell: A test of lithospheric thinning by thermal rejuvenation, Geophys. J. Int., 125, 325-339, 1996.
137. Woods, M. T., E. A. Okal, and M. Cara, Two-station measurements of Rayleigh wave group velocity along the Hawaiian swell, Geophys. Res. Lett., 18, 105-108, 1991.
138. Wysession, M. E., Large-scale structure at the core-mantle boundary from diffracted waves, Nature, 382, 244-248, 1996.
139. Zhang, S., and S.-I. Karato, Lattice preferred orientation of olivine aggregates deformed in simple shear, Nature, 375, 774-777, 1995.
140. Zhang, Y.-S., and T. Tanimoto, Three-dimensional modeling of upper mantle structure under the Pacific ocean and surrounding area, Geophys. J. R. Astron. Soc., 98, 255-269, 1989.
141. Zhao, L., and T. H. Jordan, Sensitivity of frequency-dependent travel times to laterally-heterogeneous, anisotropic Earth structure, Geophys. J. Int., 133, 683-704, 1998.
142. Zielhuis, A., and G. Nolet, Shear-wave velocity variations in the upper mantle beneath central Europe, Geophys. J. Int., 117, 695-715, 1994.
143. Zielhuis, A., and R. van der Hilst, Upper-mantle shear velocity beneath eastern Australia from inversion of waveform SKIPPY portable arrays, Geophys. J. Int., 127, 1-16, 1996.