1887
Volume 37, Issue 4
  • ISSN: 0812-3985
  • E-ISSN: 1834-7533

Abstract

Since 1997 the ANSIR Major National Research Facility has significantly enhanced Australia’s national capacity for recording regional and distant earthquakes using seismic recorders distributed across the continent. Both broad-band and short-period recorders have been deployed in innovative experimental designs that have made major contributions to the understanding of the 3D structure in the Earth’s crust and upper mantle beneath the Australian region. The Facility continues its national role with investment in equipment suitable for both seismic and electromagnetic sounding.

Deployments of recorders with broad-band seismometers have made a substantial contribution to surface wave tomography, particularly with the gathering of extensive data sets from Western Australia and a deployment bracketing the Tasman Line. The significant increase in the number of portable stations provides constraints on the character of the crust and the crust-mantle interface across the continent, via the analysis of receiver functions from distant earthquakes. Anisotropy beneath the continent is now better characterised but remains enigmatic. New analysis methods are likely to make more extensive use of continuous seismic data.

Short-period instrument deployments have been mostly directed towards delay-time tomography studies in south-eastern Australia, and have employed new methods for event picking and tomographic inversion. Enhancements to the instruments mean that servicing of experiments will be simpler in future and allow new applications with three-component recording at higher sampling rates.

Passive seismic recording offers a cost-effective way of obtaining structural information across substantial areas of the continent. The results are valuable in their own right, but can also provide important constraints on seismological structure that are valuable in planning more expensive deep crustal reflection profiles.

© 2006 ASEG
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2006-12-01
2026-01-19

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References

  1. Bannister, S., and Kennett, B.L.N., 2002. Seismic activity in the Transantarctic Mountains - results from a broadband array deployment: Terra Antarlica, 9, 41-46.
  2. Bannister, S., Yu, J., Leitner, B., and Kennett, B.L.N., 2003, Variations in crustal structure across the transition from West to East Antarctica, Southern Victoria Land: Geophysical Journal International , 155, 870-884.
  3. Clitheroe, G., and van der Hilst, R.D., 1998, Complex anisotropy in the Australian lithosphere from shear-wave splitting in broad-band SKS records: in Structure and Evolution of the Australian Continent , Braun, J., et al., (eds.), AGU Geodynamics Monograph 26, 73-78.
  4. Debayle, E., Kennett, B., and Priestley, K., 2005, Global azimuthal seismic anisotropy: the unique plate-motion deformation of Australia: Nature , 433, 509-512.
  5. Direen, N.G., and Crawford, A.J., 2003, The Tasman Line: where is it, what is it, and is it Australia’s Rodinian breakup boundary?: Australian Journal of Earth Sciences , 50, 491-502.
  6. Fishwick, S., Kennett, B.L.N., and Reading, A.M., 2005, Contrasts in lithosphere structure within the Australian craton - insights from surface wave tomography: Earth and Planetary Science Letters , 231, 163-176.
  7. Graeber, F.M., Houseman, G.A., and Greenhalgh, S.A., 2002, Regional teleseismic tomography of the western Lachlan Orogen and the Newer Volanic Province, southeast Australia: Geophysical Journal International , 149, 249-266.
  8. Heintz, M., and Kennett B.L.N., 2005, Continental shear wave splitting analysis: investigation of seismic anisotropy underneath the Australian continent: Earth and Planetary Science Letters , 236, 106-119.
  9. Kennett, B.L.N., 2003, Seismic structure in the mantle beneath Australia: Geological Society of Australia Special Publication , 22, 1-17.
  10. Kennett, B.L.N., Fishwick, S., Reading A.M., and Rawlinson N., 2004, Contrasts in mantle structure beneath Australia - relation to Tasman Lines?: Australian Journal of Earth Sciences , 51, 563-569.
  11. Poupinet G., and Kennett B.L.N., 2004, On the observation of high frequency PKiKP and its coda in Australia: Physics of the Earth and Planetary Interiors , 146, 497-511.
  12. Rawlinson, N., and Kennett, B.L.N., 2004, Rapid estimation of relative and absolute delay times across a network by adaptive stacking: Geophysical Journal International , 157, 332-340.
  13. Rawlinson, N., Kennett, B.L.N., and Heintz, M., 2006a, Insights into the structure of the upper mantle beneath the Murray Basin from 3-D teleseismic tomography: Australian Journal of Earth Sciences , 53, 595-604.
  14. Rawlinson, N., Reading, A.M., and Kennett, B.L.N., 2006b, Lithospheric structure of Tasmania from teleseismic tomography: implications for Phanerozoic evolution of Eastern Australia: Journal of Geophysical Research , 111, B02301, doi:10.129/2005JB003803.
  15. Reading, A.M., 2005, Investigating the deep structure of terranes and terrane boundaries: insights from earthquake seismic data: in Terrane Processes at the Margins ofGondwana , Vaughan, A.P.M., Leat, P.T., and Pankhurst, R.J., (eds), Geological Society of London, Special Publication 245, 293-303.
  16. Reading, A.M., 2006, The seismic structure of Precambrian and early Palaeozoic terranes in the Lambert Glacier region, East Antarctica: Earth and Planetary Science Letters , 244, 44-57.
  17. Reading, A.M., and Kennett, B.L.N., 2003, Lithospheric structure of the Pilbara Craton, Capricorn Orogen and northern Yilgarn craton, Western Australia, from teleseismic receiver functions: Australian Journal of Earth Sciences , 50, 439-445.
  18. Reading, A.M., Kennett, B.L.N., and Dentith, M.C., 2003, The seismic structure of the Yilgarn Craton, Western Australia: Australian Journal of Earth Sciences , 50, 427-438.
  19. Saygin, E., Kennett, B.L.N., and Reading, A.M., 2005, Noise Correlations at Regional Distances and Receiver Based Studies in Australia: EOS, Transactions American Geophysical Union , 86, Fall Meeting Supplement, Abstract S31A-0265.
  20. van der Hilst, R., Kennett, B., Christie, D., and Grant, J., 1994, Project Skippy
  21. explores the mantle and lithosphere beneath Australia: EOS, Transactions American Geophysical Union , 75, 177, 180, 181.
  22. Yoshizawa K., and Kennett B.L.N., 2004, Multi-mode surface wave tomography for the Australian region using a 3-stage approach incorporating finite frequency effects: Journal of Geophysical Research , 109, B02310, doi: 10.129/2002JB002254.
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  • Article Type: Research Article
Keyword(s): lithosphere; Passive seismology; tomography

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