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Study on effective methods of combined analysis of microseisms and gravity data to reveal bedrock structure

Research Project

Project/Area Number 11480100
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Natural disaster science
Research InstitutionKYOTO UNIVERSITY

Principal Investigator

AKAMATSU Junpei  Kyoto University, Disaster Prevention Research Institute, Associate Professor, 防災研究所, 助教授 (10027279)

Co-Investigator(Kenkyū-buntansha) NAKAMURA Kajuro  Kyoto University, Disaster Prevention Research Institute, Research Associate, 防災研究所, 助手 (20135510)
KOMAZAWA Masao  Geological Survey of Japan, AIST, Institute of Geoscience, Chief Researcher, 地球科学情報, 主任研究官
NISHIMURA Keiichi  Okayama University of Science, Faculty of Informatics, Professor, 総合情報学部, 教授 (60025468)
NISHIDA Ryohei  Tottori University, Faculty of Engineering, Professor, 工学部, 教授 (90027269)
MORIKAWA Hitoshi  Tokyo Institute of Technology Interdisciplinary Graduate School of Science and Engineering, Associate Professor, 大学院・理工学研究科, 助教授 (60273463)
Project Period (FY) 1999 – 2001
Project Status Completed (Fiscal Year 2001)
Budget Amount *help
¥6,000,000 (Direct Cost: ¥6,000,000)
Fiscal Year 2001: ¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 2000: ¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 1999: ¥2,500,000 (Direct Cost: ¥2,500,000)
Keywords2sSPAC analysis of microseisms / H / V spectral ratio of microseisms / Bouguer gravity anomaly / Basement of Adapazari, Turkey / Basement of Yumigahama Peninsula / Faults along basin edge / Basement of Lijiang basin, Yunnan / Basement of Hiroshima plain / V解析 / アダパザル盆地の基盤構造 / プルアパートベイズン / 中国雲南省麗江盆地の基盤構造
Research Abstract

The object of this research is to develop a suitable method to elucidate 3D basement structure of a sedimentary basin with thick soil deposits, using observational data of microseisms and gravity anomaly, aiming at microzonation of urban area for prevention and mitigation of earthquake disaster. Basic idea for studying the configuration of bedrock is (1) estimation of velocity structure from the dispersion of Rayleigh waves with array observation of microseisms, and (2) estimation of depth to bedrock at various sites with horizontal-to-vertical spectral ratio (H/V) analysis. In the basin, array observations are made at several sites, and the resultant velocity structures are interpolated for 3D model using H/V data at many sites in the basin. For array analysis, we have developed a simple technique using only 2 set of seismometers, 2sSPAC method. Bouguer gravity anomaly provides distribution of densities. Thus, we can discuss the structure model with different physical parameters, namely, seismic impedance and density, and can obtain physically reliable structural model. In this research project, we studied various structural basin which had been seriously damaged by earthquakes: Kyoto basin, Ohmi basin, Hiroshima Plain, Yumigahama Peninsula, Tottori Plain, Nara basin, Lijiang basin in Yunnan, China, and Adapazari, Turkey. As a result, it is pointed out that, concentration of severe damage took place in the region where the configuration of bedrock is steep. This is true for all the basins analyzed but Nara basin, because there is no information on damage distribution in Nara basin. In conclusion, our method is considered useful for microzoning sedimentary basin.

Report

(4 results)
  • 2001 Annual Research Report   Final Research Report Summary
  • 2000 Annual Research Report
  • 1999 Annual Research Report
  • Research Products

    (29 results)

All Other

All Publications (29 results)

  • [Publications] Akamatsu, J.: "Subsurface structure of Lijiang basin, Yunnan, China as related to damage distribution caused by the M7.0 Lijiang Earthquakr of February 3, 1996"Proc.12th World Conf.on Earthquake Engineering. (CD-ROM). 322/4/A (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] 盛川 仁: "鳥取県西部地震の余震記録に基づく基盤構造の推定"地震工学研究発表会講演論文集. 第1分冊. 353-356 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] 西村敬一: "地球物理探査による近江盆地の基盤構造の推定"琵琶湖のカルデラ形成史の研究,琵琶湖博物館研究調査報告. 15. 106-116 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Komazawa, M.: "Bedrock structure in Adapazari, Turkey ---A possible cause of severe damage by the 1999 Kocaeli Earthquake ---"Soil Dynamics and Earthquake Engineering. 22. 829-836 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] 西村敬一: "重力および脈動を用いた広島市の基盤構造の推定"第11回日本地震工学シンポジウム論文集. 241-246 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] 中村佳重郎: "京都盆地南部の巨椋池干拓地およびその周辺部の地盤の特性について"第12回環境地質学シンポジウム論文集. 237-242 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Akamatsu, J.: "Subsurface structure of Lijiang basin, Yunnan China as related to damage distribution caused by M7.0 Lijiang Earthquake of February 3, 1996"Proc. 12th World Conf. on Earthquake Engineering. Pap, No.322/4/A. (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Nishimura, K.: "Basement structure of Ohmi basin, east of Lake Biwa, as deduced from geophysical exploration (in Japanese with English Abstract)"Research Report of the Lake Biwa Museum. No.15. 1060-0116 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Komazawa, M.: "Bedrock structure in Adapazari, Turkey --- A possible cause of severe damage by the 1999 Kocaeli Earthquake ---"Soli Dynamics and Earthquake Engineering. 22. 829-836 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Morikawa, H.: "Bedrock structure in Adapazari, Turkey, inferred from gravity anomaly and microseisms (in Japanese with English Summary)"Proc. 11th Japan Earthq. Eng. Symp.. Pap. No.60. (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Nishimura, K.: "Estimation of ground structure in Hiroshima using gravity and microseisms (in Japanese with English Summary)"Proc. 11th Japan Earthq. Eng. Symp.. Pap. No.48. (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Nakamura, K.: "Ground vibration characteristics and subsurface structure in and around Oguraike reclaimed land, in the southern part of Kyoto basin"Proc. 12th Symp. Geo-Environments and Geo-Technics. 237-242 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] 赤松 純平: "トルコ・アダパザル周辺の基盤構造調査-その2"第11回環境地質学シンポジウム論文集. 435-440 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] 盛川 仁: "余震、微動、重力を用いた弓ヶ浜半島における2次元基盤構造の推定"地震II. 55(印刷中). (2002)

    • Related Report
      2001 Annual Research Report
  • [Publications] Nishimura, K.: "Subsurface structure of Lijiang basin,Yunnan,China as related to damage distribution caused by the M7.0 Lijiang Earthquake of 1996"Proc.12th World Conf.on Earthquake Engineering. (CD-ROM). No.322/4/A (2000)

    • Related Report
      2001 Annual Research Report
  • [Publications] 駒澤 正夫: "中国雲南省麗江盆地の重力基盤構造-1996年麗江地震の被害分布と重力構造-"京都大学防災研究所年報. 43B-1. 67-74 (2000)

    • Related Report
      2001 Annual Research Report
  • [Publications] 中村 佳重郎: "重力異常と脈動を用いたトルコ・アダパザル周辺の基盤構造の推定"地震工学研究発表会講演論文集. 第1分冊. 285-288 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] 西田 良平: "鳥取県西部地震の余震記録に基づく基盤構造の推定"地震工学研究発表会講演論文集. 第1分冊. 353-356 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] J.Akamatsu: "Subsurface structure of Lijiang basin, Yunnan China as related to damage distribution caused by the M7.0 Lijiang Earthquake of February 3,1996"Proc.of 12th World Conference on Earthquake Engineering. (CD-ROM). Pap No.322/4/A (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 赤松純平: "トルコ・アダパザル周辺の基盤構造調査"第10回環境地質学シンポジウム論文集. 49-54 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] K.Nishimura: "Configuration of bedrock below thr Lijiang basin, Yunnan Province, China, as deduced from seismic explosion"Proc.2nd Japn-China Workshop on Prediction and Mitigation of Seismic Risk in Urban Region, Univ.of Shiga Pref.. 181-187 (1999)

    • Related Report
      2000 Annual Research Report
  • [Publications] 駒澤正夫: "中国雲南省麗江盆地の重力基盤構造-1996年麗江地震の被害分布と重力構造-"京都大学防災研究所年報、43B-1、67-74. 43B-1. 67-74 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 中村佳重郎: "トルコ・アダパザリの重力基盤構造"第19回自然災害学会年次学術講演会要旨集. 7-8 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] H.Morikawa: "Estimation of phase velocities from microseisms observed at two sites"Proc.2nd Int'l Conf.on Earthquake Geotechnical Engineering. Vol.1. 119-124 (1999)

    • Related Report
      2000 Annual Research Report
  • [Publications] J.Akamatsu: "Subsurface structure of Lijiang basin,Yunnan China as related to damage distribution caused by the M7.0 Lijiang Earthquake of February 3,1996"Proc.of 12th World Conference on Earthquake Engineering. CD-ROM. Pap No.322/4/A (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] 赤松 純平: "脈動、地震探査、重力異常から推定される中国雲南省麗江盆地の地下構造"京都大学防災研究所年報. 42B-1. 167-177 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 駒澤 正夫: "重力異常からみた中国雲南省麗江盆地の基盤構造"第9回環境地質学シンポジウム論文集. 9巻. 41-44 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] H.Morikawa: "Estimation of phase velocities from microseisms observed at two sites"Proc.2nd Int'l Conf.on Earthquake Geotechnical Engineering. Vol.1. 119-124 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] K.Nishimura: "Configuration of bedrock below thr Lijiang basin,Yunnan Province,China,as deduced from seismic explosion"Proc.2nd Japn-China Workshop on Prediction and Mitigation of Seismic Risk in Urban Region,Univ.of Shiga Pref.. 181-187 (1999)

    • Related Report
      1999 Annual Research Report

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Published: 1999-04-01   Modified: 2016-04-21  

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