On the causes of biased estimates of seismic moment for earthquakes in central Asia

Journal of Geophysical Research: Solid Earth

Volumn 107, Issue 11, 2002, Pages

  Patton, Howard J ^a   Randall, George E ^a  

^a LOS ALAMOS NATIONAL LABORATORY   (United States)

Author keywords

Body waves; Central Asia; Inversion; Seismic moment; Source mechanism; Surface waves

Indexed keywords

BODY WAVE; EARTHQUAKE; GREEN FUNCTION; SEISMIC MOMENT; SOURCE PARAMETERS; SURFACE WAVE;

(WEST); CHINA;

EID: 0038556707     PISSN: 21699313     EISSN: 21699356     Source Type: Journal    
DOI: None     Document Type: Article

References (29)

1. Aki, K., and P. G. Richards, Quantitative Seismology: Theory and Methods, W. H Freeman, New York, 1980.
2. Ammon, C. J., and G. E. Randall, Joint inversion of waveforms and spectra for earthquake faulting parameters (abstract), Eos Trans. AGU, 79(46), Fall Meet. Suppl., F661, 1999.
3. Chapman, C. H., The WKBJ seismogram algorithm, in Seismological Algorithms: Computational Methods and Computer Programs, edited by D. J. Doornbos, pp. 47-74, Academic, San Diego, Calif., 1988.
4. Chapman, C. H., and J. A. Orcutt, The computation of body wave synthetic seismograms in laterally homogeneous media, Rev. Geophys., 23, 105-163, 1985.
5. Dziewonski, A. M., and D. L. Anderson, Preliminary reference Earth model, Phys. Earth Planet. Inter., 25, 297-356, 1981.
6. Dziewonski, A. M., and J. H. Woodhouse, Studies of the seismic source using normal mode theory, in Earthquakes: Observation, Theory and Interpretation, edited by H. Kanamori, Proc. Int. Sch. Phys. Enrico Fermi, 85, 45-137, 1983.
7. Dziewonski, A. M., G. Masters, and G. Laske, Feasibility of construction of a 3-D reference Earth model. Seismol. Res. Lett., 71, 260, 2000.
8. Engdahl, E. R., R. van der Hilst, and R. Buland. Global teleseismic earthquake relocation with improved travel times and procedures for depth determination, Bull. Seismol. Soc. Am., 88, 722-743, 1998.
9. Fielding, E., M. Barazangi, B. Isacks, and D. Seber, A network-accessible geological and geophysical database for Eurasia, north Africa, and the Middle East: Digital database development for the Middle East and north Africa, in Proceedings of the 16th Annual Seismic Research Symposium, edited by J. J. Cipar, J. F. Lewskowicz, and J. M. McPhetres, Rep. PL-TR-94-2217, pp. 85-91, Phillips Lab., Kirtland Air Force Base, N. M., 1994.
10. Gao, L., and P. G. Richards, Studies of earthquakes on and near the Lop Nor, China, nuclear test site, in Proceedings of the 16th Annual Seismic Research Symposium, edited by J. J. Cipar, J. F. Lewkowicz, and J. M. McPhetres, Rep. PL-TR-94-2217, pp. 106-112, Phillips Lab., Kirtland Air Force Base, N. M., 1994.
11. Ghose, S., M. W. Hamburger, and C. J. Ammon, Source parameters of moderate-size earthquakes in the Tien Shan, central Asia, from regional moment tensor inversion, Geophys. Res. Lett., 25, 3181-3184, 1998.
12. Helffrich, G. R., How good are routinely determined focal mechanisms? Empirical statistics based on a comparison of Harvard, USGS and ERI moment tensors, Geophys. J. Int., 131, 741-750, 1997.
13. Kennett, B. L. N., Seismic Wave Propagation in Stratified Media, 342 pp., Cambridge Univ. Press, New York, 1983.
14. Kosarev, G. L., N. V. Petersen, L. P. Vinnik, and S. W. Roecker, Receiver functions for the Tien Shan analog network: Contrasts in the evolution of structures across the Talasso-Fergana fault, J. Geophys. Res., 98, 4437-4448, 1993.
15. Landisman, M., A. Dziewonski, and Y. Sato, Recent improvements in the analysis of surface wave observations, Geophys. J. R. Astron. Soc., 17, 369-403, 1969.
16. Mahdi, H., and G. L. Pavlis, Velocity variations in the crust and upper mantle beneath the Tien Shan inferred from Rayleigh wave dispersion: Implications for tectonic and dynamic processes, J. Geophys. Res., 103, 2693-2703, 1998.
17. Mangino, S., K. Priestley, and J. Ebel, The receiver structure beneath the China Digital Seismograph Network stations, Bull. Seismol. Soc. Am., 89, 1053-1076, 1999.
18. Patton, H. J., Bias in the centroid moment tensor for central Asian earthquakes: Evidence from regional surface wave data, J. Geophys. Res., 103, 26,963-26,974, 1998a.
19. Patton, H. J., Ground truth focal depths for central Asian earthquakes, internal memorandum, Los Alamos Natl. Lab., Los Alamos, N. M., 23 Dec. 1998b.
20. Patton, H. J., and K. Aki, Bias in the estimate of seismic moment tensor by the linear inversion method, Geophys. J. R. Astron. Soc., 59, 479-495, 1979.
21. Patton, H. J., S. R. Taylor, D. B. Harris, and J. M. Mills, The utility of regional Chinese seismograms for source and path studies in central Asia, Geophys. J. R. Astron. Soc., 81, 469-478, 1985.
22. b discriminant to new tectonic regions, Bull. Seismol. Soc. Am., 87, 1083-1099, 1997.
23. Randall, G. E., Efficient calculation of complete differential seismograms for laterally homogeneous earth models, Geophys. J. Int., 118, 245-254, 1994.
24. Ringdal, F., Study of magnitudes, seismicity, and earthquake detectability using a global network, Bull. Seismol. Soc. Am., 76, 1641-1659, 1986.
25. Sipkin, S. A., Estimation of earthquake source parameters by the inversion of waveform data: Synthetic waveforms, Phys. Earth Planet. Inter., 30, 242-259, 1982.
26. Steck, L. K., A. A. Velasco, A. H. Cogbill, and H. J. Patton, Improving regional seismic location in China, Pure Appl. Geophys., 158, 211-240, 2001.
27. Tsai, Y.-B., and K. Aki, Precise focal depth determination from amplitude spectra of surface waves, J. Geophys. Res., 75, 5729-5743, 1970.
28. Woods, B. B., C. K. Saikia, H. K. Thio, and H. J. Patton, Focal depths and source parameters for earthquakes in northwest China, Tech. Rep. DOE SUB/F53310018/8f, URS Greiner Woodward Clyde, Pasadena, Calif., 1998.
29. Zhu, L., D. V. Helmberger, C. K. Saikia, and B. B. Woods, Regional waveform calibration in the Pamir-Hindu Kush region, J. Geophys. Res., 102, 22,799-22,813, 1997.