SWAS: A shear-wave analysis system for semi-automatic measurement of shear-wave splitting above small earthquakes

Physics of the Earth and Planetary Interiors

Volumn 159, Issue 1-2, 2006, Pages 71-89

  Gao, Yuan ^a,b   Hao, Ping ^a   Crampin, Stuart ^a,b,c  

^a INSTITUTE OF GEOPHYSICS   (China)

^b UNIVERSITY OF EDINBURGH   (United Kingdom)

^c BRITISH GEOLOGICAL SURVEY   (United Kingdom)

Author keywords

Expert systems; Polarisation diagrams; Semi automatic analysis; Shear wave analysis system (SWAS); Shear wave splitting; Temporal variations

Indexed keywords

EARTHQUAKES; EXPERT SYSTEMS; POLARIZATION; TIME VARYING SYSTEMS;

SEMI-AUTOMATIC ANALYSIS; SHEAR-WAVE ANALYSIS SYSTEM; SHEAR-WAVE SPLITTING; TEMPORAL VARIATIONS;

SHEAR WAVES;

ANISOTROPY; EARTHQUAKE; EXPERT SYSTEM; POLARIZATION; S-WAVE; SEISMOGRAM; SEISMOMETRY; WAVE SPLITTING;

ARCTIC; ICELAND;

EID: 33747673024     PISSN: 00319201     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.pepi.2006.06.003     Document Type: Article

References (26)

1. Angerer E., Crampin S., Li X.-Y., and Davis T.L. Processing, modelling, and predicting time-lapse effects of overpressured fluid-injection in a fractured reservoir. Geophys. J. Int. 149 (2002) 267-280
2. Booth D.C., and Crampin S. Shear-wave polarizations on a curved wavefront at an isotropic free-surface. Geophys. J. R. Astron. Soc. 83 (1985) 31-45
3. Crampin S. The scattering of shear waves in the crust. Pure Appl. Geophys. 132 (1990) 67-91
4. Crampin S. The fracture criticality of crustal rocks. Geophys. J. Int. 118 (1994) 428-438
5. Crampin S. Calculable fluid-rock interactions. J. Geol. Soc. 156 (1999) 501-514
6. Crampin S. The new geophysics: shear-wave splitting provides a window into the crack-critical rock mass. Leading Edge 22 (2003) 536-549
7. Crampin S., and Gao Y. A review of techniques for measuring shear-wave splitting above small earthquakes. Phys. Earth. Planet. Inter. 159 (2006) 1-14
8. Crampin S., and Zatsepin S.V. Modelling the compliance of crustal rock: II-response to temporal changes before earthquakes. Geophys. J. Int. 129 (1997) 495-506
9. Crampin S., Zatsepin S.V., Slater C., and Brodov L.Y. Abnormal shear-wave polarizations as indicators of pressures and over pressures. Proceedings of the 58th Conference, EAGE. Amsterdam (1996) Extended Abstracts X038
10. Crampin S., Volti T., Chastin S., Gudmundsson A., and Stefánsson R. Indication of high pore-fluid pressures in a seismically-active fault zone. Geophys. J. Int. 151 (2002) F1-F5
11. Crampin S., Chastin S., and Gao Y. Shear-wave splitting in a critical crust: III-preliminary report of multi-variable measurements in active tectonics. J. Appl. Geophys. 54 (2003) 265-277
12. Crampin S., Peacock S., Gao Y., and Chastin S. The scatter of time-delays in shear-wave splitting above small earthquakes. Geophys. J. Int. 156 (2004) 39-44
13. Gao Y., and Zheng S.H. Cross correlation function analysis of shear wave splitting: method and example of its application. J. Earthq. Pred. Res. 4 (1995) 224-237
14. Gao Y., Wang P., Zheng S., Wang M., Chen Y.-T., and Zhou H. Temporal changes in shear-wave splitting at an isolated swarm of small earthquakes in 1992 near Dongfang, Hainan Island Southern China. Geophys. J. Int. 135 (1998) 102-112
15. Gao Y., Liu X., Liang W., and Hao P. Systematic analysis method of shear-wave splitting: SAM software system. Earthq. Res. China 18 (2004) 365-372
16. Hao, P., Gao, Y. Crampin, S., 2006. An Expert System for measuring shear-wave splitting above small earthquakes. Internal Report, available at http://www.geos.ed.ac.uk/homes/scrampin/opinion/.
17. Jackson P. Introduction to Expert Systems (1990), Addison-Wesley, Reading, Massachusetts
18. Li X.-Y., and Crampin S. Complex component analysis of shear-wave splitting: case studies. Geophys. J. Int. 107 (1991) 605-613
19. Liu Y., Crampin S., and Main I. Shear-wave anisotropy: spatial and temporal variations in time delays at Parkfield Central California. Geophys. J. Int. 130 (1997) 771-785
20. Peacock S., Crampin S., Booth D.C., and Fletcher J.B. Shear-wave splitting in the Anza seismic gap Southern California: temporal variations as possible precursors. J. Geophys. Res. 93 (1988) 3339-3356
21. Stefánsson R., et al. Earthquake prediction research in South Iceland seismic zone and the SIL project. Bull. Seism. Soc. Am. 86 (1993) 696-716
22. Tong C., and Kennett B.L.N. Automatic seismic event recognition and later phase identification for broadband seismogram. Bull. Seism. Soc. Am. 86 (1996) 1896-1909
23. Volti T., and Crampin S. A four-year study of shear-wave splitting in Iceland: 1. Background and preliminary analysis. In: Nieuwland D.A. (Ed). New insights into structural interpretation and modelling 212 (2003), Geol. Soc. Lond., Spec. Publ 117-133
24. Volti T., and Crampin S. A four-year study of shear-wave splitting in Iceland: 2. Temporal changes before earthquakes and volcanic eruptions. In: Nieuwland D.A. (Ed). New insights into structural interpretation and modelling 212 (2003), Geol. Soc. Lond., Spec. Publ 135-149
25. Yardley G.S., and Crampin S. Shear-wave anisotropy in the Austin Chalk, Texas, from multi-offset VSP data: case studies. Can. J. Expl. Geophys. 29 (1993) 163-176
26. Zhu Y., Vogel A., and Hao P. Expert System for earthquake hazard assessment: ESEHA in earthquake hazard and risk (1996), Kluwer Academic Publishers