Search Results 1-20 of 78

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  • AMT Observations over the Seismic Active Region in Hakone Volcano : Preliminary Results  [in Japanese]

    吉村 令慧 , 小川 康雄 , 行竹 洋平 [他] , 山崎 友也 , 加茂 正人 , 神田 径 , 小森 省吾 , 後藤 忠徳 , 本多 亮 , 原田 昌武 , 安田 陽二郎 , 谷 昌憲

    2011年3月11日の東北地方太平洋沖地震の発生を受けて,誘発的地震活動の活発化の見られた箱根火山地域において,その発生域の構造的特徴を把握するために,2011年12月に計39観測点でのAudio-frequency Magnetotelluric (AMT) 法探査を実施した。既存の広帯域MT法探査のデータも加え,位相テンソル楕円・インダクションベクトルを各周期で求めたところ,駒ヶ岳直下ならびに …

    京都大学防災研究所年報 (55), 105-111, 2011

    IR 

  • FUNDAMENTAL STUDY ON SEISMIC RETROFIT METHOD FOR OLD WOODEN HOUSES USING TIE RODS ANCHORED IN GROUND

    KISHIKI Shoichi , TSUZUKI Midori , WADA Akira

    … Lessons learned from the past earthquakes told us the importance of developing seismic performances and retrofitting of wooden houses. … In this study, a seismic retrofit method for old wooden houses using tie rods anchored in ground is proposed. … Finally, evaluation method for tensile strength of the tie rods was established based on simple mechanism and soil investigations from Swedish sounding method. …

    Journal of Structural and Construction Engineering (Transactions of AIJ) 75(658), 2213-2220, 2010

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  • A study on geographical analysis of a residential housing development on artificial fill  [in Japanese]

    MATSUSHITA Katsuya , FUJII Mamoru , MORI Tomohiro , KAZAMA Motoki , HAYASHI Koichi

    大規模造成宅地において切盛分布や盛土厚さを把握する手法として,新旧地形図の比較による方法がある。しかし,新旧地形図から作成された切盛図の精度の検証はあまり行われていない。本論文は,既存の谷埋め型大規模盛土造成地(開発総面積110,000m<sup>2</sup>)をモデルとして,縮尺の異なる新旧地形図から作成した切盛図の精度比較を行うとともに,平面的に高密度に実施したスウェ …

    Japanese Geotechnical Journal 5(1), 89-101, 2010

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  • 90. Deep Seismic Sounding by Microtremor Survey Method in an urban area, Osaka Southwest Japan  [in Japanese]

    Minami Yuichiro , Matsuoka Tatsuro , Haraguchi Tsuyoshi , Motoki Kenta

    研究発表会講演論文集 平成22年, 179-180, 2010

    NDL Digital Collections 

  • SUPPORT ACTIVITY ON STRONG MOTION OBSERVATION AND GEOTECHNICAL INVESTIGATION FOR EARTHQUAKE DISASTER MITIGATION IN INDONESIA

    MIWA Shigeru , AYDAN Ömer , SUZUKI Takanobu , ENDO Ichiro , SUZUKI Tomoji , SUNADA Naohiko , KIYONO Junji

    2004年12月の巨大地震から引き続き多くの地震災害に見舞われたインドネシアに対し,NPO国境なき技師団などが災害復興支援活動を実施している.現地では復興計画を策定するために不可欠な被災地域の地盤データがほとんどなかったことから,スウェーデン式貫入試験による地盤調査法や結果を液状化判定や防災計画へ反映する方法を現地技術者に指導する活動をスマトラ島の各地で継続的に実施してきた.また,インドネシアでは …

    Journal of Japan Society of Civil Engineers, Ser. A1 (Structural Engineering & Earthquake Engineering (SE/EE)) 65(1), 748-756, 2009

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  • Inner Bay sedimentary environment and Tsunami Scouring risk - Example from Uchinoura cove on Tanabe Bay, Southwest Japan -

    YOSHINAGA Yuichi , HARAGUCHI Tsuyoshi , SEKIGUCHI Hideo , TORII Kazuki , AZUMA Ryokei

    … The sub-bottom seismic profiling in Uchinoura cove identified a few distinct reflectors in the seabed, implying the presence of tsunami-related horizons. …

    Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) 65(1), 746-750, 2009

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  • IDENTIFICATION OF FLOOD-RELATED SEDIMENTARY FEATURES WITH NON-DESTRUCTIVE SUBSURFACE EXPLORATIONS  [in Japanese]

    AZUMA Ryoukei , SEKIGUCHI Hideo , KAMAI Toshitaka

    近年の洪水氾濫災害の頻発は現行の治水システムが持つ根本的な課題を浮き彫りにしている.将来型の氾濫原マネジメントを考えるうえに,旧河道や破堤地形などの水害地形を定量的に計測・評価し,地域の洪水特性を考慮した治水対策を実施することが望まれる.本研究では,歴史的に水害常襲地であった宇治川左岸高水敷(河口から43.0km付近)を重点調査域とし,非破壊物理探査法(比抵抗探査および表面波探査)による埋没水害地 …

    Doboku Gakkai Ronbunshuu B 65(2), 141-150, 2009

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  • Permafrost and hydrology in the source area of the Yellow River

    Matsuoka Norikazu , Ikeda Atsushi , Sueyoshi Tetsuo , Ishii Takemasa

    チベット高原北東部に位置する黄河源流域において,永久凍土分布とその縮小を明らかにするために,2003年から2006年にかけて凍土環境の調査を行った.まず標高3250 ~4800 m間の18 ヵ所において,弾性波探査,電気探査と地温調査により永久凍土の有無を調べ,GISを用いて探査結果に最も合う永久凍土分布図を作成した.また,マドォ測候所(標高4273 m)にて2年間,気温,地温(0 ~8 m深), …

    BULLETIN OF THE GEOLOGICAL SURVEY OF JAPAN 60(1-2), 39-57, 2009

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  • Current Research Status and Future of Electromagnetic Survey Methods towards Integrated Analysis with Seismic Methods  [in Japanese]

    GOTO Tada-nori , MIKADA Hitoshi

    …  Electromagnetic (EM) methods have been developed for estimating the apparent resistivity or conductivity of material composing subsurface structure depending on survey objectives, while seismic methods are applied mainly to understand geological structure or stratigraphy. … Magnetotelluric subsurface sounding (MT) methods are proven tools detect high-conductivity anomalies in the Earth's interior; …

    Journal of Geography (Chigaku Zasshi) 117(6), 997-1010, 2008-12-25

    J-STAGE  References (49) Cited by (1)

  • Survey of offshore active fault  [in Japanese]

    Okamura Yukinobu

    … Acoustic and seismic waves are widely used for offshore topographic and geologic surveys. … Higher frequency acoustic waves have high-resolution but attenuate rapidly in water or sediments, thus they are mainly used for seafloor topographic survey or shallow high-resolution seismic profiling survey. … Multi-narrow beam sounding provided evolutionary detailed seafloor topographic maps that clearly show fault traces. …

    Active Fault Research 2008(28), 31-39, 2008

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  • Permafrost Sounding (2003-2005) in the Source Area of the Yellow River, Northeastern Tibet

    IKEDA Atsushi , SUEYOSHI Tetsuo , MATSUOKA Norikazu , ISHII Takemasa , UCHIDA Youhei

    地理学評論 = Geographical review of Japan 80(5), 259-271, 2007-04-01

    References (32)

  • Permafrost Sounding (2003-2005) in the Source Area of the Yellow River, Northeastern Tibet

    IKEDA Atsushi , SUEYOSHI Tetsuo , MATSUOKA Norikazu , ISHII Takemasa , UCHIDA Youhei

    Seismic, electrical and/or thermal soundings were undertaken at 15 sites between 3260m and 4790m ASL in 2003-2005. …

    Geographical Review of Japan 80(5), 259-271, 2007

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  • Characterization of the 2007 Noto Hanto earthquake, central Japan: insights from seismic profiling, aftershock observations, and co-seismic crustal deformation  [in Japanese]

    Sato Hiroshi , Iwasaki Takaya , Kanazawa Toshihiko , Miyazaki Shin-ichi , Kato Naoko , Sakai Shin'ichi , Yamada Tomoaki , Miyauchi Takahiro , Ito Tanio , Hirata Naoshi

    … Based on the seismic profiles acquired by two-ship seismic reflection profiling and aftershock distribution determined by densely deployed seismic stations, we constructed the 3D geometry of the source fault, trending ENE to NE and dipping 60 degrees south. … Around the focal area, detailed topography and bathymetry had been measured by laser scanning and echo sounding before the earthquake. …

    Bulletin of the Earthquake Research Institute,University of Tokyo 82(4), 369-379, 2007

    IR 

  • Offshore crustal movement associated with the 2007 Noto Hanto earthquake  [in Japanese]

    Yoshida Susumu , Noguchi Takeo , Cho Takahiro , Shimazaki Masanori , Koba Masanobu , Sato Hiroshi

    … To reveal the amount of vertical crustal movement, echo sounding and sonic prospecting were carried out just after the earthquake. … The new observations were carefully compared to the previous data acquired in 1985 and 2006 and co-seismic vertical crustal movement was obtained along several tracks. …

    Bulletin of the Earthquake Research Institute,University of Tokyo 82(4), 333-344, 2007

    IR 

  • Combination of handy geophysical methods for sounding permafrost  [in Japanese]

    IKEDA Atsushi , FUKUI Kotaro , MATSUOKA Norikazu

    日本地理学会発表要旨集 = Proceedings of the General Meeting of the Association of Japanese Geographers (69), 231, 2006-03-10

  • Combination of handy geophysical methods for sounding permafrost

    Ikeda Atsushi , Fukui Kotaro , Matsuoka Norikazu

    山岳永久凍土帯下限付近において永久凍土の分布と構造を推定するために、簡便な弾性波探査(屈折法)と電気探査(比抵抗法垂直探査)を多数の地点で実施してきた。とくに2つの手法を併用した32ヵ所の結果をもとに、それぞれの手法の山岳永久凍土の探査における有効性を検証する。<BR><BR>調査地<BR>調査地域は中国青海省チベット高原北東部、スイス南東部ベルニナアルプス、日 …

    Proceedings of the General Meeting of the Association of Japanese Geographers 2006s(0), 210-210, 2006

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  • Damage investigation on geotechnical disaster in Banda Ache due to Sumatra earthquake

    Honda Tsuyoshi , Towhata Ikuo , Suratman Ilyas , Wicasono Ruta

    2004年12月26日にスマトラ島沖で発生した大地震 (Mw=9.0) に伴う津波によって, インド洋の沿岸国にて大規模な津波被害が発生し, 大津波の脅威が連日にわたり報道された. また大規模地震では強震動による構造物被害の発生も予測されたが, 津波の発生前の地震動による被害状況の情報はほとんど皆無であった. そこで, 強震動による地盤災害と構造物被害の状況を把握するためにインドネシア共和国ナング …

    Environmental systems research 28(0), 224-224, 2005

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  • An analysis of the geothermal structure of the Ogiri geothermal field based on the surveys and operational data of the Ogiri Power Station after its commencement.  [in Japanese]

    HORIKOSHI Takamasa , TAKAYAMA Junichi , TAKESHITA Kazuhiro , GOKO Kazunori , YOSHIZAWA Hirofumi

    … An analysis of the geothermal structure and fluid flow in the Ogiri geothermal field was carried out based on the surveys and operational data of the Ogiri Power Station after its commencement.<BR>The results are as follows: (1) Based on the precise seismic reflection survey by NEDO and the electromagnetic sounding method (AMT method) by NKG, it is estimated that the Ginyu-south fault, which runs through the Ora hot spring and forms a geothermal reservoir parallel to the Ginyu fault, exists in the Ogiri field; …

    Shigen-Chishitsu 55(1), 25-38, 2005

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