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Study of the inhomogeneous structure of the earth from the analysis of scattering phenomena of broad band seismic waves

Research Project

Project/Area Number 15540399
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Solid earth and planetary physics
Research InstitutionTohoku University

Principal Investigator

SATO Haruo  Tohoku University, Graduate School of Science, Professor, 大学院・理学研究科, 教授 (80225987)

Project Period (FY) 2003 – 2004
Project Status Completed (Fiscal Year 2004)
Budget Amount *help
¥3,200,000 (Direct Cost: ¥3,200,000)
Fiscal Year 2004: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 2003: ¥2,200,000 (Direct Cost: ¥2,200,000)
KeywordsInterior of solid earth / seismic waves / inhomogeneity / scattering / lithosphere / random media / 地球内部構造
Research Abstract

Study of inhomogeneous structure of the earth medium is important for understanding the evolution process of the earth. We performed three seismological studies as follows : 1.Small-scale inhomogeneity of the lithosphere based on the analysis of high-frequency seismic waves : Combining the radiative transfer theory and the Markov approximation, we constructed a hybrid model for the synthesis of the whole scalar-wave envelope in 2-D random media. Extending the Markov approximation for vector wave propagation in 2-D elastic random media, we proposed a new synthesis model, which quantitatively explains envelopes synthesized by the finite difference simulation. Scattering due to random inhomogeneity well explains the peak amplitude decay and the envelope broadening observed. Strong scattering beneath Quaternary volcanoes was revealed from the envelope broadening analysis in Tohoku district. We made the depth profile of the Moho and the subducting Philippine-sea plate in Chugoku-Shikoku dis … More trict by using the receiver function method. 2.Scattering characteristics in the mantle from the analysis of ScS phase in intermediate periods : Analyzing wave envelopes around the ScS phase of regional earthquakes by using the isotropic scattering model based on PREM, we first estimated quantitatively the scattering coefficient in the mantle for periods from 4 to 10 s. 3.Envelope analysis of long period Rayleigh waves : We analyzed vertical-component seismograms of large earthquakes in long periods recorded by IRIS and F-net. The array analysis revealed that the fundamental mode Rayleigh waves dominate early lapse times but higher modes dominate as lapse time increases because of small attenuation in the lower mantle. We find that the coda attenuation factor directly represents the attenuation factor in the lower mantle. Clarifying the scattering characteristics between Rayleigh waves and body waves in random elastic half media, we established the solid base for the envelope synthesis in long periods. Less

Report

(3 results)
  • 2004 Annual Research Report   Final Research Report Summary
  • 2003 Annual Research Report
  • Research Products

    (26 results)

All 2005 2004 2003 Other

All Journal Article (21 results) Publications (5 results)

  • [Journal Article] Unified Explanation of Envelope Broadening and Maximum-Amplitude Decay of High-Frequency Seismograms based on the Envelope Simulation using the Markov Approximation : Forearc Side of the Volcanic Front in Northeastern Honshu, Japan2005

    • Author(s)
      Saito, T., H.Sato, M.Ohtake, K.Obara
    • Journal Title

      Journal of Geophysical Research, Solid-Earth 110

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Synthesis of plane vector wave envelopes in two-dimensional random elastic media based on the Markov approximation and comparison with finite-difference simulations2005

    • Author(s)
      Michael Korn, Haruo Sato
    • Journal Title

      Geophysical Journal International 161

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Unified Explanation of Envelope Broadening and Maximum-Amplitude Decay of High-Frequency Seismograms based on the Envelope Simulation using the Markov Approximation : Forearc Side of the Volcanic Front in Northeastern Honshu, Japan2005

    • Author(s)
      Saito, T., H.Sato, M.Ohtake, K.Obara
    • Journal Title

      J.Geophys.Res. 110, B01304

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Synthesis of plane vector wave envelopes in two-dimensional random elastic media based on the Markov approximation and comparison with finite-difference simulations2005

    • Author(s)
      Michael Korn, Haruo Sato
    • Journal Title

      Geophys.J.Int. 161, 839-848

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Configuration of Subducting Philippine Sea Plate beneath Southwest Japan Revealed from Receiver Function Analysis based on the multivariate autoregressive model2004

    • Author(s)
      Shiomi, K., H.Sato, K.Obaral, M.Ohtake
    • Journal Title

      Journal of Geophysical Research, Solid-Earth 109

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Hybrid Synthesis of Scalar Wave Envelopes in 2-D Random Media Having Rich Short Wavelength Spectra2004

    • Author(s)
      Sato, H., M.Fehler, T.Saito
    • Journal Title

      Journal of Geophysical Research, Solid-Earth 109

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Annual Research Report 2004 Final Research Report Summary
  • [Journal Article] Moho and Philippine Sea plate structure beneath central Honshu Island, Japan, from teleseismic receiver functions2004

    • Author(s)
      Yoshimoto, K., et al.
    • Journal Title

      Earth Planets Space 56

      Pages: 271-277

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Configuration of Subducting Philippine Sea Plate beneath Southwest Japan Revealed from Receiver Function Analysis based on the multivariate autorearessive model2004

    • Author(s)
      Shiomi, K., H.Sato, K.Obara1, M.Ohtake
    • Journal Title

      J.Geophys.Res. 109, B04308

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Hybrid Synthesis of Scalar Wave Envelopes in 2-D Random Media Having Rich Short Wavelength Spectra2004

    • Author(s)
      Sato, H., M.Fehler, T.Saito
    • Journal Title

      J.Geophys.Res. 109, B06303

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Moho and Philippine Sea plate structure beneath central Honshu Island, Japan, from teleseismic receiver functions2004

    • Author(s)
      Yoshimoto, K., H.Fujisawa, T.Okada, N.Umino, A.Hasegawa, K.Obara, K.Shiomi, H.Tsukahara, S.Okamoto, T.Kawanaka, H.Sato, T.Nishimura, H.Sato, M.Ohtake
    • Journal Title

      Earth Planets Space 56

      Pages: 271-277

    • NAID

      10017467212

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Configuration of Subducting Philippine Sea Plate beneath Southwest Japan Revealed from Receiver Function Analysis based on the multivariate autoregressive model2004

    • Author(s)
      Shiomi, K., H.Sato, K.Obara, M.Ohtake
    • Journal Title

      Journal of Geophysical Research, Solid-Earth 109

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Moho and Philippine Sea plate structure beneath central Honshu Island, Japan, from teleseismic receiver functions2004

    • Author(s)
      Yoshimoto, et al.
    • Journal Title

      Earth Planets Space (印刷中)

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Unified Explanation of Envelope Broadening and Maximum-Amplitude Decay of High-Frequency Seismograms based on the Envelope Simulation using the Markov Approximation : Forearc Side of the Volcanic Front in Northeastern Honshu, Japan2004

    • Author(s)
      Saito, T., H.Sato, M.Ohtake, K.Obara
    • Journal Title

      Journal of Geophysical Research, Solid-Earth (印刷中)

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Synthesis of Rayleigh-wave envelope on the spherical Earth : Analytic solution of the single isotropic-scattering model for a circular source radiation2003

    • Author(s)
      Maeda, T., H.Sato, M.Ohtake
    • Journal Title

      Geophysical Research Letters 30

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Estimation of S-wave scattering coefficient in the mantle from envelope characteristics before and after the ScS arrival2003

    • Author(s)
      Lee, W.S., H.Sato, K.H.Lee
    • Journal Title

      Geophysical Research Letters 30

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Simulating the Envelope of Scalar Waves in 2D Random Media Having Power-Law Spectra of Velocity Fluctuation2003

    • Author(s)
      Saito, T., H.Sato, M.Fehler, M.Ohtake
    • Journal Title

      Bulletin of the Seismological Society of America 93

      Pages: 240-252

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Laboratory Study on Scattering Characteristics of Shear Waves in Rock Samples2003

    • Author(s)
      Fukushima, Y., O.Nishizawa, H.Sato, M.Ohtake
    • Journal Title

      Bulletin of the Seismological Society of America 93

      Pages: 253-263

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Synthesis of Rayleigh-wave envelope on the spherical Earth : Analytic solution of the single isotropic-scattering model for a circular source radiation2003

    • Author(s)
      Maeda, T., H.Sato, M.Ohtake
    • Journal Title

      Geophys.Res.Lett. 30,1286-

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Estimation of S-wave scattering coefficient in the mantle from envelope characteristics before and after the ScS arrival2003

    • Author(s)
      Lee, W.S., H.Sato, K.H.Lee
    • Journal Title

      Geophys.Res.Lett. 30, 24, 2248

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Simulating the Envelope of Scalar Waves in 2D Random Media Having Power-Law Spectra of Velocity Fluctuation2003

    • Author(s)
      Saito, T., H.Sato, M.Fehler, M.Ohtake
    • Journal Title

      Bull.Seismol.Soc.Amer. 93, 1

      Pages: 240-252

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Laboratory Study on Scattering Characteristics of Shear Waves in Rock Samples2003

    • Author(s)
      Fukushima, Y., O.Nishizawa, H.Sato, M.Ohtake
    • Journal Title

      Bull.Seismol.Soc.Amer. 93, 1

      Pages: 253-263

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Publications] Lee W.S., H.Sato, K.H.Lee: "Estimation of S-wave scattering coefficient in the mantle from envelope characteristics before and after the ScS arriva"Geophysical Research Letters. 30・24. 2248,doi:10.1029/2003GL018413 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Saito T., H.Sato, M.Fehler, M.Ohtake: "Simulating the Envelope of Scalar Waves in 2D Random Media Having Power-Law Spectra of Velocity Fluctuation"Bulletin of the Seismological Society of America. 93・1. 240-252 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Fukushima Y., O.Nishizawa, H.Sato, M.Ohtake: "Laboratory Study on Scattering Characteristics of Shear Waves in Rock Samples"Bulletin of the Seismological Society of America. 93・1. 253-263 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Shiomi K., H.Sato, K.Obara 1, M.Ohtake: "Configuration of Subducting Philippine Sea Plate beneath Southwest Japan Revealed from Receiver Function Analysis Based on the Multivariate AR Model"Journal of Geophysical Research, Solid-Earth. (印刷中). (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] Sato H., M.Fehler, T.Saito: "Hybrid Synthesis of Scalar Wave Envelopes in 2-D Random Media Having Rich Short Wavelength Spectra"Journal of Geophysical Research, Solid-Earth. (印刷中). (2004)

    • Related Report
      2003 Annual Research Report

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Published: 2003-04-01   Modified: 2016-04-21  

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