The search for the Slichter mode: Comparison of noiselevels of superconducting gravimeters and investigation of a stacking method

Physics of the Earth and Planetary Interiors

Volumn 140, Issue 1-3, 2003, Pages 183-202

  Rosat, Severine ^a   Hinderer, Jacques ^a   Crossley, David ^b   Rivera, Luis ^a  

^a CNRS   (France)

^b Saint Louis University   (United States)

Author keywords

Noise levels; Seismic modes; Slichter mode; Sub seismic modes; Superconducting gravimeters

Indexed keywords

EARTHQUAKE; GEODYNAMICS; GRAVIMETRY; INNER CORE; SEISMIC NOISE; SEISMICITY;

PERU;

EID: 0345581324     PISSN: 00319201     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.pepi.2003.07.010     Document Type: Article

References (33)

1. Banka, D., 1997. Noise levels of superconducting gravimeters at seismic frequencies. PhD thesis, GDMB-Informationgesellschaft mbH, Clausthal, Germany.
2. Banka D.Crossley D.Noise levels of superconducting gravimeters at seismic frequencies Geophys. J. Int. 139 1999 87-97
3. Buland R.Berger J.Gilbert F.Observations from the IDA network of attenuation and splitting during a recent earthquake Nature 277 1979 358-362
4. Crossley, D.J., 1988. The excitation of core modes by earthquakes. Geophys. Monogr. Am. Geophys. Union 46 (1), 41-50.
5. Crossley D.J.Hinderer J.Legros H.On the excitation, detection and damping of core modes Phys. Earth Planet. Inter. 68 1991 97-116
6. Crossley, D., Hinderer, J., Casula, G., Francis, O., Hsu, H.T., Imanishi, Y., Jentzsch, G., Kääriäinen, J., Merriam, J., Meurers, B., Neumeyer, J., Richter, B., Shibuya, K., Sato, T., Van Dam, T., 1999. Network of superconducting gravimeters benefits a number of disciplines. Eos. Trans. Am. Geophys. Union 80 (11), 121, 125-126.
7. Courtier N.Ducarme B.Goodkind J.Hinderer J.Imanishi Y.Seama N.Sun H.Merriam J.Bengert B.Smylie D.E.Global superconducting gravimeter observations and the search for the translational modes of the inner core Phys. Earth Planet. Inter. 117 2000 3-20
8. Cummins P.Wahr J.M.Agnew D.C.Tamura Y.Constraining core undertones using stacked IDA gravity records Geophys. J. Int. 106 1991 189-198
9. Dahlen F.A.The normal modes of a rotating, elliptical Earth Geophys. J. R. Astron. Soc. 16 1968 329-367
10. Dahlen F.A.Models of the lateral heterogeneity of the Earth consistent with eigenfrequency splitting data Geophys. J. R. Astron. Soc. 44 1976 77-105
11. Dahlen F.A.Sailor R.V.Rotational and elliptical splitting of the free oscillations of the Earth Geophys. J. R. Astron. Soc. 58 1979 609-623
12. Dziewonski A.M.Anderson D.L.Preliminary reference Earth model (PREM) Phys. Earth Planet. Int. 25 1981 297-356
13. Freybourger M.Hinderer J.Trampert J.Comparative study of superconducting gravimeters and broadband seismometers STS-1/Z in sub-seismic frequency bands Phys. Earth Planet. Inter. 101 1997 203-217
14. Gilbert F.Dziewonski A.M.An application of normal mode theory to the retrieval of structural parameters and source mechanisms from seismic spectra Philos. Trans. Royal Soc. London, Ser. A 278 1975 187-269
15. Hinderer J.Crossley D.Jensen O.A search for the Slichter triplet in superconducting gravimeter data Phys. Earth Planet. Int. 90 1995 183-195
16. Kobayashi N.Nishida K.Continuous excitation of planetary free oscillations by atmospheric disturbances Nature 395 1998 357-360
17. Lindberg, C., 1986. Multiple taper spectral analysis of terrestrial free oscillations, Ph.D. Thesis, University of California, San Diego.
18. Nawa K.Suda N.Fukao Y.Sato T.Tamura Y.Shibuya K.McQueen H.Virtanen H.Kääriäinen J.Incessant excitation of the Earth's free oscillations: Global comparison of superconducting gravimeter records Phys. Earth Planet. Int. 120 2000 289-297
19. Peterson, J., 1993. Observations and Modelling of Seismic Background Noise. Open-File Report 93-332. U.S. Department of Interior, Geological Survey, Albuquerque, New Mexico.
20. Ritzwoller M.Lavely E.M.Three dimensional seismic models of the Earth's mantle Rev. Geophys. 33 1995 1-66
21. Rosat S.Hinderer J.Crossley D.A comparison of the seismic noise levels at various GGP stations Bull. Inf. Marées Terrestres 135 2002 10689-10700
22. Slichter L.B.The fundamental free mode of the Earth's inner core Proc. Natl. Acad. Sci. U.S.A. 47 1961 186-190
23. Smylie D.E.The inner core translational triplet and the density near Earth's center Science 255 1992 1678-1682
24. Smylie D.E.Hinderer J.Richter B.Ducarme B.The product spectra of gravity and barometric pressure in Europe Phys. Earth Planet. Inter. 80 1993 135-157
25. Suda N.Nawa K.Fukao Y.Earth's background free oscillations Science 279 1998 2089-2091
26. Tanimoto T.Um J.Nishida K.Kobayashi N.Earth's continuous oscillations observed on seismically quiet days Geophys. Res. Lett. 25 1998 1553-1556
27. Van Camp M.Measuring seismic normal modes with the GWR C021 superconducting gravimeter Phys. Earth Planet. Inter. 116 1999 81-92
28. Wenzel H.-G.The nanogal software: Earth tide data processing package ETERNA 3.30 Bull. Inf. Marées Terrestres 124 1996 9425-9439
29. Widmer-Schnidrig R.What can superconducting gravimeters contribute to normal mode seismology? Bull. Inf. Marées Terrestres 135 2002 10701-10712
30. Woodhouse, J.H., 1988. The calculation of eigenfrequencies and eigenfunctions of the free oscillations of the Earth and the Sun. In: Doornbos, D.J. (Ed.), Seismological Algorithms, Computational Methods and Computer Programs, Academic Press, London, UK, 321-370.
31. Woodhouse J.H.Dahlen F.A.The effect of a general aspherical perturbation on the free oscillations of the Earth Geophys. J. Royal Astron. Soc. 53 1978 335-354
32. Zürn W.Laske G.Widmer-Schnidrig R.Gilbert F.Observation of Coriolis coupled modes below 1mHz Geophys. J. Int. 143 2000 113-118
33. Zürn W.Widmer R.On noise reduction in vertical seismic records below 2 mHz using local barometric pressure Geophys. Res. Lett. 22 1995 3537-3540