메뉴 건너뛰기




Volumn 298, Issue 5599, 2002, Pages 1737-1742

Geophysics: The spectral-element method, beowulf computing, and global seismology

Author keywords

[No Author keywords available]

Indexed keywords

COMPUTER AIDED ANALYSIS; SEISMOLOGY;

EID: 0037195623     PISSN: 00368075     EISSN: None     Source Type: Journal    
DOI: 10.1126/science.1076024     Document Type: Review
Times cited : (224)

References (41)
  • 7
    • 0345072527 scopus 로고    scopus 로고
    • J. Ritsema, H. J. Van Heijst, J. H. Woodhouse, Science 286, 1925 (1999). Mantle model S20RTS is a degree 20 shear velocity model based on fundamental and higher-mode Rayleigh wave dispersion, teleseismic body wave travel times, and normal-mode splitting data. It is assumed that compressional velocity heterogeneity α is identical to shear velocity heterogeneity β in S20RTS, except for a depth-dependent scaling factor, R = δlnβ/δlnβ, which increases linearly from 1.3 at the surface to 3.0 at the core-mantle boundary.
    • (1999) Science , vol.286 , pp. 1925
    • Ritsema, J.1    Van Heijst, H.J.2    Woodhouse, J.H.3
  • 18
    • 2242488485 scopus 로고    scopus 로고
    • note
    • The main difficulty comes from the singularity of coordinates at the center of Earth.
  • 23
    • 2242427341 scopus 로고    scopus 로고
    • note
    • Not all of these effects play an important role at any given frequency: the effects of self-gravitation and rotation only matter at periods longer than about 100 s, whereas the effect of the oceans is only observed at periods less than about 50 s.
  • 27
    • 2242462455 scopus 로고    scopus 로고
    • thesis, Université Paris VII Denis Diderot. This thesis introduces the first implementation of the SEM for global wave propagation
    • E. Chaljub, thesis, Université Paris VII Denis Diderot (2000). This thesis introduces the first implementation of the SEM for global wave propagation.
    • (2000)
    • Chaljub, E.1
  • 28
    • 0036252025 scopus 로고    scopus 로고
    • D. Komatitsch, J. Tromp, Geophys. J. Int. 149, 390 (2002). The article discusses the theoretical and numerical aspects of the SEM and validates the method for seismic wave propagation at the scale of the entire globe.
    • (2002) Geophys. J. Int. , vol.149 , pp. 390
    • Komatitsch, D.1    Tromp, J.2
  • 33
    • 2242470537 scopus 로고    scopus 로고
    • note
    • The cost of the calculation is due to the fact that the mesh contains 498 million degrees of freedom.
  • 34
    • 0001511635 scopus 로고    scopus 로고
    • C. Bassin, G. Laske, G. Masters, EOS 81, F897 (2000). To avoid artificial reflections between block edges, we slightly smooth model CRUST2.0 by averaging over spherical caps with a 2° radius.
    • (2000) EOS , vol.81
    • Bassin, C.1    Laske, G.2    Masters, G.3
  • 35
    • 85080852099 scopus 로고    scopus 로고
    • PREM) is determined by applying the same cross-correlation method to SEM synthetic seismograms computed for 50 earthquakes at 400 worldwide stations, which renders a geographical distribution of 55 bounce points that is similar to the data. This calculation required a total of 100 days of dedicated CPU time on our PC cluster.
    • (2002) Geophys. Res. Lett. , vol.29 , pp. 72
    • Ritsema, J.1    Rivera, L.A.2    Komatitsch, D.3    Tromp, J.4    Van Heijst, H.J.5
  • 40
    • 2242436491 scopus 로고    scopus 로고
    • We encourage interested research groups to download the SEM software package from the "Theoretical and Computational Seismology" Web page of the Seismological Laboratory at Caltech (www. gps.caltech.edu/∼jtromp/research).
    • Theoretical and Computational Seismology
  • 41
    • 2242487581 scopus 로고    scopus 로고
    • note
    • 55-5 map, and two anonymous reviewers for helpful comments. This research was funded in part by the NSF.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.