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Study on Concealed Active Fault in the Urban Area of Kobe

Research Project

Project/Area Number 09640543
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Geology
Research InstitutionKobe University

Principal Investigator

MIYATA Takao  Kobe University Faculty of Science Professor, 理学部, 教授 (00107989)

Project Period (FY) 1997 – 1998
Project Status Completed (Fiscal Year 1998)
Budget Amount *help
¥3,400,000 (Direct Cost: ¥3,400,000)
Fiscal Year 1998: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 1997: ¥3,000,000 (Direct Cost: ¥3,000,000)
KeywordsHyogoken-Nanbu Earthquake / concealed active fault / Goshukebashi Fault / Ground-penetrating radar / flexure / strongly-damaged lines of lifelines / Kobe urban area / 地下レーダ探査 / 反射強度 / 地表変状
Research Abstract

We investigated , the relationship between the co-seismic ground damages during the 1995 Hyogoken-Nanbu Earthquake (M_<JMA> 7.2) and the concealed active faults in the urban area of Kobe. The ground damages were estimated from 1307 inclined utility poles and 1,277 dislocated house inlets. We used the ground-penetrating radar (GPR) method with the 200 MHz and 100 MHz antennas for the detailed examination of the concealed active faults, which were found by seismic reflection surveys (Hyogo Prefecture Government, Committee on Earthquake Observation and Research in Kansai Area, etc.). The following results were obtained in the urban area of Kobe : (1) The strong ground damages have the characteristic pattern, distributing as spots and lines. The linear distribution is consistent with w southwestward extension of the well-known Goshukebashi fault in the Rokko Mountains. (2) the two zones of deformation in the Late Pleistocene to Holocene strata such as discontinuity and flexure were found in a subsurface zone of 10 m wide : One is located just over the concealed fault (Oji fault), and the other is at the Mikage flexure beneath the Ishiyagawa River Park, Kobe City. They appeared respectively to the southwestward extension from the Gosukebashi fault and the Mikage flexure. (3) The two deformation zones on the GPR profiles, are in harmony with the strongly-damaged lines of lifelines (utility poles, house inlets etc.) during the earthquake.

Report

(3 results)
  • 1998 Annual Research Report   Final Research Report Summary
  • 1997 Annual Research Report
  • Research Products

    (31 results)

All Other

All Publications (31 results)

  • [Publications] 宮田隆夫: "地下レーダーで隠れた活断層をさぐる-都市の伏在活断層図作成に向けて-" 兵庫県政学(印刷中). n.5. 141-147 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Lin,A.: "Paleoseismic events and the 1596 Keicho-Fushimi large earthquake produced by slip on the Gosukebashi fault at the eastern Rokko Mountains,Japan" The Island Arc.v.7. 621-636 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Miyata,T.: "Ground-penetrating Radar Survey for Urban Active Fault In Kobe" Proc.8th Symp.on Geo-Enviroments and Geo-Technics. 119-124 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 苦瓜泰秀: "汚水桝の水平剪断から推定した1995年兵庫県南部地震による神戸市街地の撃力分布" 地質学雑誌. v.104. 199-209 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 宮田隆夫: "1995年兵庫県南部地震による神戸市街地の地盤変状" 地質学論集. n.51. 89-101 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Miyata,T.: "1995 Hyogoken-Nanbu(Kobe)Earthquake and Urban active fault" Proc.30th Int'l Geol.Congr.v.5. 133-139 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Murata, A.: "Vertical displacement and average slip rate of the Nojima Fault." The Island Arc. v.8 (in press). (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Lin, A.: "Cataclastic rocks found along the Nojima fault in Awaji Island, Japan and their implications for the tectonic history" The Island Arc. v.8 (in press). (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Miyata, T.: "Geo-Radar Survey for Buried Active Fault-Compiling a Concealed Active Fault in Urban Area- Japanese" Hyogo Kensei-Gaku. n.5, (in press). 141-147 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Lin, A.: "Paleoseismic events and the 1596 Keicho-Fushimi large earthquake produced by slip on the Gosukebashi fault at the eastern Rokko Mountains, Japan" The Island Arc. v.7. 621-636 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Miyata, T.: "Ground-penetrating Radar Survey for Urban Active Fault in Kobe" Proc.8th Symp.on Geo-Enviroments and Geo-Technics. 119-124 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Lin, A.: "Tectonic characteristics of the central segment of the Tancheng-Lujiang fault zone, Shandong Peninsula, eastern China" Tectonophysics. v.293. 85-104 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Miyata, T.: "Ground-penetrating radar surveys for urban active fault of the 1995 Hyogoken-Nanbu Earthquake" Proc.1st Iran-Japan Workshop on Recent Earthquakes in Iran & Japan. 47-56 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Miyata, T.: "Ground-penetrating Radar Survey for a Buried Active Fault in Urban Area. Japanese" Report of Research Center for Urban Safety and Security, Kobe Univ.n.2. 263-272 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Miyata, T.: "Ground damages in the urban area of Kobe at the 1995 Hyogo-ken Nambu earthquake. Japanese with English abstract" Mem.Geol.Soc.Japan. n.51. 89-101 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Nigauri, Y.: "Distribution of impulsive force from deformed house inlets in Kobe during the 1995 Southern Hyogo Prefecture Earthquake. Japanese with English abstract" Jour.Geol.Soc.Japan. v.104. 199-209 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Miyata, T.: "1995 Hyogoken-Nanbu (Kobe) Earthquake and Urban.active fault" Proc.30th Int'l Geol.Congr.v.5. 133-139 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Maruyama, T.: "Deformational topography and late Quaternary activity of the Gosukebashi fault zone in the eastern Rokko Mountains, Japan. Japanese with English abstract" Active Fault Research. n.16. 59-72 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Nigauri, Y.: "Ground distribution from house inlets in the urban area of east Kobe during the 1995 Southern Hyogo Prefecture Earthquake. Japanese with English abstract" Structural Geology. n.42. 63-67 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Hong,J.: "Strike-slip origin of Cretaceous Mazhan Basin,Tan-Lu Fault Zone,Shangdong,East China." The Island Arc. v.8,n.1(in press). (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] 宮田隆夫: "地下レーダで隠れた活断層をさぐる-都市の伏在活断層図作成に向けて-" 兵庫県政学. n.5(印刷中). 141-147 (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] 宮田隆夫: "都市の埋もれた活断層を地下レーダで探る" 神戸大学都市安全研究センター研究報告. n.2. 263-272 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Miyata,T.: "Ground-penetrating Radar Survey for Urban Active Fault In Kobe" Proc.8th Symp.on Geo-Enviroments and Geo-Technics. 119-124 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Miyata,T.: "Ground-penetrating radar surveys for urban active fault of the 1995 Hyogoken-Nanbu Earthquake." Proc.1st Iran-Japan Workshop on Recent Earthquakes in Iran & Japan. 47-56 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Lin,A: "Tectonic characteristics of the central segment of the Tanchen-Lujiang Fault zone,Shandong Peninsula,eastern China." Tectonophysics. v.293. 85-104 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] 宮田隆夫他3名: "1995 Hyogoken-Nanbu(Kobe)Earthquake and urban active faults." The Proceedings of 30th International Geological Congress. v.5. 133-139 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 宮田隆夫・前田保夫: "1995年兵庫県南部地震による神戸市街地の地盤変状." 地質学論集. n.46. 86-98 (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] 苫瓜泰秀・宮田隆夫: "汚水桝の変位からみた兵庫県南部地震による神戸市東部の地盤変状." 構造地質. n.42. 63-67 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 苫瓜泰秀・宮田隆夫: "汚水桝の水平剪断から推定した1995年兵庫県南部地震による神戸市街地の撃力分布." 地質学雑誌(印刷中). v.104. (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] 丸山正・林愛明・宮田隆夫: "六甲山地東部五助橋断層帯の変位地形と第四紀後期の活動性." 活断層研究. v.16. 59-72 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 林愛明・丸山正・宮田隆夫著者: "Paleoseismic events and the 1596 Keicho-Fushimi large earthquake in the Gosukebashi fault in the eastern Rokko Mountains." The Island Arc. (in Press). (1998)

    • Related Report
      1997 Annual Research Report

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Published: 1997-04-01   Modified: 2016-04-21  

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