Search Results 1-20 of 2455

  • Design of Mizuho Town Government Office : Located near Tachikawa Fault Zone  [in Japanese]

    森高 英夫 , 田中 智 , 馬場 勇輝 , 濱田 俊介 , 市川 水彩

    Menshin (109), 11-16, 2020-07

  • The Iyo-Bungo Earthquake of September 1st, 1596 in Southwest Japan as Deduced from Contemporary Historical Records  [in Japanese]

    石橋 克彦

    地震 = Zisin : journal of the Seismological Society of Japan 72([5]), 69-89, 2020-01

  • Middle Holocene palaeoseismic history of Kozu-Matsuda Fault Zone inferred from off-fault palaeoseismological evidences in Ashigara Plain, central Japan  [in Japanese]

    佐藤 善輝 , 水野 清秀 , 中島 礼 , 山崎 晴雄

    活断層研究 = Active fault research (52), 9-24, 2020

  • Landslide Caused by the July 2020 Torrential Rain in the Southern Part of Kumamoto Prefecture  [in Japanese]

    <p> 2020年7月3日から4日に記録的な豪雨に見舞われた熊本県南部の芦北町と津奈木町では多数の斜面災害や浸水被害等が発生し,14名の貴重な人命が奪われた.今回の斜面災害はジュラ紀の付加体が分布する地域を中心に起こっており,土石流に移行したものとそうでないものが認められた.いずれのタイプの崩壊も厚い風化土層内で発生したものであり,深さが20 m程度に達するものはあるが,岩盤が大きく破 …

    Journal of Geography (Chigaku Zasshi) 129(5), Cover05_01-Cover05_02, 2020


  • Heterogeneity of Stress Field in NE Japan and Implications for Fault Strength and Earthquake Occurrence Mechanism  [in Japanese]

    YOSHIDA Keisuke , MATSUZAWA Toru

    … According to quantitative modeling studies, the deviatoric stress magnitude in the seismogenic zone in NE Japan should be in the order of tens of MPa, which is too small to overcome laboratory-derived fault strength. … This suggests that fault weakening mechanisms, including the low frictional coefficient of the fault surface and overpressurized fluids, play an important role in the generation of earthquakes. …

    Journal of Geography (Chigaku Zasshi) 129(4), 451-471, 2020


  • Hyper Dense Seismic Observation for Investigation on Fault Zone Development: Application to Hypocentral Area of 2000 Western Tottori Earthquake  [in Japanese]

    MATSUMOTO Satoshi , IIO Yoshihisa , SAKAI Shinichi , KATO Aitaro , Group for "0.1 Manten" Hyper Dense Seismic Observation

    … <p> One important factor controlling crustal strength is fault zone development. … A fault can mature through multiple stages where small faults are generated by rupturing homogeneous media, and are partially connected each other, with large deformations locally concentrated along a major fault. …

    Journal of Geography (Chigaku Zasshi) 129(4), 511-527, 2020


  • Evolution of Fault Zones and Its Rheology  [in Japanese]

    OOHASHI Kiyokazu , TAKESHITA Toru , HIRAUCHI Ken-ichi

    … In this paper, we investigate time- and displacement-dependent fault-zone weakening (softening) over geological time caused by the hydrothermal alteration of rock, the development of faulting-related structure and fabric, and changes in the relevant deformation mechanisms. … In the shallow portion of the continental seismogenic zone (< … 5 km), hydrothermal alteration induced by comminution and fluid flow along fault zones progressively enriches weak phyllosilicates. …

    Journal of Geography (Chigaku Zasshi) 129(4), 473-489, 2020


  • The Quaternary Tectonics of Central Kyushu and the 2016 Kumamoto Earthquake: From a Multifaceted Viewpoint Combining Geology, Seismology, and Geodesy  [in Japanese]

    OOHASHI Kiyokazu , OTSUBO Makoto , MATSUMOTO Satoshi , KOBAYASHI Kenta , SATO Katsushi , NISHIMURA Takuya

    … Deformation histories of the Futagawa and Hinagu fault zones, the source faults of the Kumamoto earthquake, are also established in an attempt to explain the relationship between geologic structures and rupture processes of the earthquake. …

    Journal of Geography (Chigaku Zasshi) 129(4), 565-589, 2020



    MAZDA Taiji , MIYAMOTO Mutsuki , NISHIMURA Takashi , KAJITA Yukihide , NANBA Masayuki , NAITO Nobuyuki

    <p> 日本の高速道路では,地震発生時に発生した地震の規模により通行規制及び点検が行われている.さらにレベル2地震動を含む大規模地震が発生した場合には,24時間以内に緊急車両が通行可能となるような目標を設定している.しかし橋梁が受ける損傷の程度は地震動の特性によって大きく異なるため,緊急点検を効率的に行うことが困難である.2016年に発生した熊本地震を受けて,2017年に道路橋示方書1 …

    Journal of Japan Society of Civil Engineers, Ser. A1 (Structural Engineering & Earthquake Engineering (SE/EE)) 76(4), I_486-I_494, 2020


  • Tectonic Division in and around the Izu Peninsula Based on the Soft Clustering of Surface Displacement Rate Field  [in Japanese]

    MITSUI Yuta , WATANABE Satoru

    … <p>On the basis of statistical (soft) clustering of a horizontal displacement field from Global Navigation Satellite System, we conduct tectonic classification around the Izu Peninsula, a collisional zone in Japan. … (3) Fault zones of landward extension of subduction trenches (the Suruga Trough and the Sagami Trough) do not correspond to the cluster boundaries.</p> …

    Zisin (Journal of the Seismological Society of Japan. 2nd ser.) 73(0), 27-35, 2020


  • CO diffusive emission in the co-seismic rupture zone of the Wenchuan <i>M<sub>S</sub></i> 8.0 earthquake

    Sun Yutao , Zhou Xiaocheng , Du Jianguo , Guo Zhengfu

    … 8.0 earthquake produced the ~240-km-long Yingxiu-Shuiguan rupture zone and the ~72-km-long Tongji-Hanwang rupture zone. … Abiogenic CO in the WSRZ might origin from the low crust flow and chemical reactions of the C-H-O fluids in the active fault zone. …

    GEOCHEMICAL JOURNAL 54(3), 91-104, 2020


  • Various internal structures of upheaval zone around terminal part of landslide : A case of tephra slide induced by 2018 Hokkaido Eastern Iburi Earthquake  [in Japanese]

    TAJIKA Jun , AMEMIYA Kazuo , INUI Tetsuya , TODA Hideaki , NISHINO Yoshihito , TAKAMI Tomoyuki

    Journal of the Japan Landslide Society 57(3), 84-89, 2020


  • Triple Seismic Zone Revisited:——"Super-subduction" as a New View of Plate Convergence——  [in Japanese]

    SENO Tetsuzo

    … <p>Subduction off Miyagi and Fukushima prefectures, northern Honshu, has been recognized as having a triple-planed structure of seismicity at the deep thrust zone in the 40-60 km depth range. … This triple seismic zone is composed of thrust-type earthquakes, down-dip compressional and down-dip tensional earthquakes from top to bottom. …

    Zisin (Journal of the Seismological Society of Japan. 2nd ser.) 73(0), 1-25, 2020


  • Neotectonic fault movement and intraplate seismicity in the central Indian shield: A review and reappraisal


    … In this contribution, we have attempted to analyze the nature of intraplate earthquakes of the central Indian shield with special reference to the Son–Narmada–Tapti (SONATA) zone which is known as a paleo–rift with Precambrian ancestry and a proven geological history of repeated tectonic rejuvenation throughout the Phanerozoic. … The cause of the neotectonic fault movements, the paleo–seismic records and the seismic history of the SONATA zone are discussed in detail. …

    Journal of Mineralogical and Petrological Sciences 115(2), 138-151, 2020


  • The Indo–Eurasia convergent margin and earthquakes in and around Tibetan Plateau

    WANG Yanbin , DENG Yangfan , SHI Feng , PENG Zhigang

    … Shallow events (focal depths <50 km) show remarkable correlation with surface fault systems in both spatial locations and focal mechanisms. … Underneath southern Tibet, the subducted Indian plate extends northward to at least the Bangong–Nujiang suture zone, with IDEQs occurring in the lower crust and the adjacent upper mantle. …

    Journal of Mineralogical and Petrological Sciences 115(2), 118-137, 2020


  • Formation of intracratonic Gondwana basins: Prelude of Gondwana fragmentation?

    DASGUPTA Prabir

    … These rift systems along with the late Paleozoic fault systems developed within the reconstructed Gondwanaland define broad concentric patterns with some radial strike–slip varieties about 'centers' tentatively located along the south–eastern margin of Africa. … The radial pattern of ice movement and development of concentric fault zones can be attributed to some regional domal uplift, due to penetration of plume heads into the upper mantle. …

    Journal of Mineralogical and Petrological Sciences 115(2), 192-201, 2020


  • Serpentinite enigma of the Rakhabdev lineament in western India: Origin, deformation characterization and tectonic implications

    SARKAR Dyuti Prakash , ANDO Jun–ichi , DAS Kaushik , CHATTOPADHYAY Anupam , GHOSH Gautam , SHIMIZU Kenji , OHFUJI Hiroaki

    … <p>Serpentine mineralogy controls fault rheology in the ocean and continental rift settings to subduction settings and hence can be used to discern the paleo deformational conditions. … The exhumation of mantle wedge antigorite serpentinite is, therefore, indicating a paleo–subduction zone culminating in a crustal–scale collision boundary expressed as arcuate discontinuous bodies forming the Rakhabdev lineament.</p> …

    Journal of Mineralogical and Petrological Sciences 115(2), 216-226, 2020


  • Forefront of studies on mud volcanoes: Advances in studies on inland mud volcanoes in the last 8 years  [in Japanese]

    Tanaka Kazuhiro , Asano Keiji , Watanabe Masatoshi , Komatsubara Dai , Suzuki Koichi

    <p>日本および台湾の陸上泥火山は冠線および断層沿いに分布している.冠線沿いに分布する泥火山では,不透水性キャップロックの下位に形成される高塩濃度地下水により飽和したマッドチャンバーにおいて,脱ガスが起こり,発生した高いガス圧により流体が上方へ水圧破砕を繰り返しながら移動し,地表において弱線部より破壊的噴出を行う.その際,地表部に様々な規模の陥没地形を生成する.地表部にキャップロックが …

    The Journal of the Geological Society of Japan 126(1), 39-51, 2020


  • Earthquake fault and severe damage along the Kiyomasa-kodo (Seisho-kodo)during 2016 Kumamoto earthquake, Southwest Japan  [in Japanese]

    WATANABE Mitsuhisa , SUZUKI Yasuhiro

    <p>2016年熊本地震時には、清正公道に沿って、右ずれをともなう開口亀裂等の地変が生じた。また、墓地や家屋の被害が顕著であるなど、清正公道に沿って地震被害は局所的に大きかった。右ずれ変位を示す地変を横切って掘削調査を実施した結果、地変は清正公道の埋土の中ではなく、明らかに地山(黒土層と火山灰層)の中に連続していることが明らかかになった。ピット底面付近での観察によって、大きな開口割れ目 …

    Proceedings of the General Meeting of the Association of Japanese Geographers 2020s(0), 317, 2020


  • The Advancement of Research on Inland Earthquake Generation 2014–2018

    Matsumoto Satoshi , Okada Tomomi , Terakawa Toshiko , Uyeshima Makoto , Iio Yoshihisa

    … The crust and mantle response to the magathrust earthquake induced changes in the mechanical conditions of the seismogenic zone. … However, we clearly recognize that, in order to understand and predict the inland earthquake generation process, it will inevitably be necessary to unify the research on various spatial and temporal scales, from problems related to long-term stress loading from plate-relative motion to instant fault response.</p> …

    Journal of Disaster Research 15(2), 96-105, 2020


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