Abstract
The limits of linear moment-tensor inversions from long-period teleseismic body waves are analysed in detail, using inverse methods. We focus our attention on single-station and few-stations methods. Information on the feasibility of full or deviatoric moment-tensor determinations prior to inversion are deduced from the system conditioning. The resolution and correlation of the momenttensor components are analysed using the resolution matrix. Conclusions on the importance and independence of the data are drawn from the information matrix. The single--station case and its implications are discussed in greater detail, as well as possible constraints on the inversion.
Similar content being viewed by others
References
Aki, K., andRichards, P. G.,Quantitative Seismology, Theory and Methods (W. H. Freeman and Co., San Francisco 1980).
Cara, M. (1973),Filtering of Dispersed Wavetrains, Geophys. J. R. Astr. Soc. 33, 65–80.
Dreger, D. S., andHelmberger, D. V. (1993),Determination of Source Parameters at Regional Distances with Three-component Sparse Network Data, J. Geophys. Res98, 8107–8125.
Dufumier, H., (1995),Détermination de Tenseurs des Moments Sismiques à partir d'Ondes de Volume et de Surface Télésismiques — Approches Directes et Inverses, Limites d'Applicabilité, Ph.D. Thesis, EOPGS, Université Louis Pasteur, Strasbourg.
Dufumier, H., andCara, M. (1995),On the Limits of Linear Moment-tensor Inversion of Surface Wave Spectra, Pure and Appl. Geophys.145, 2.
Dziewonski, A. M., Bloch, S., andLandisman, M. (1969),A Technique for the Analysis of Transient Seismic Signals, Bull. Seismol. Soc. Am.59, 427–444.
Ekström, G., (1989),A Very Broad Band Inversion Method for the Recovery of Earthquake Source Parameters, Tectonophys.166, 73–100.
Ekström, G., andRichards, P. G. (1994),Empirical Measurements of Tectonic Moment Release in Nuclear Explosions from Teleseismic Surface Waves and Body Waves, Geophys. J. Int.117, 120–140.
Fitch, T. J., North, R. G., andShields, M. W. (1981),Focal Depths and Moment Tensor Representations of Shallow Earthquakes Associated with the Great Sumba Earthquake, J. Geophys. Res.89, 9357–9374.
Kanamori, H., andStewart, G. (1976),Mode of the Strain Release along the Gibbs Fracture Zone, Mid-Atlantic Ridge, Phys. Earth Plan. Int.11, 312–332.
Kennet, B.,Radiation from a moment tensor source. InSeismological Algorithms — Computational Methods and Computer Programs (ed. D. J. Doornbos) (Academic Press, San Diego 1988), pp. 427–441.
Kocaoglu, A. H., andLong, L. T. (1993),A Review of Time-frequency Analysis Techniques for Estimation of Group Velocities, Seismol. Res. Lett.64, (2), 157–167.
Riedesel, M. A., Jordan, T. H., Sheehan, A. F., andSilver, P. G., (1986),Moment Tensor Spectra of the 19 Sept. 85 and 21 Sept. 85 Michoacan, Mexico, Earthquakes, Geophys. Res. Lett.13 (6), 609–612.
Stein, S., andWiens, D. A. (1986),Depth Determination for Shallow Teleseismic Earthquakes: Methods and Results, Rev. Geophys.24, 806–832.
Tarantola, A., andValette, B. (1982),Generalised Nonlinear Inverse Problem Solved Using the Least-squares Criterion, Rev. Geophys. Res.74, 6603–6661.
Tarantola, A.,Inverse Problem Theory, Methods for Data Fitting and Model Parameter Estimation (Elsevier, Amsterdam 1987).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Dufumier, H. On the limits of linear moment-tensor inversion of teleseismic body wave spectra. PAGEOPH 147, 467–482 (1996). https://doi.org/10.1007/BF00878839
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF00878839