Seismic Pseudo Reflection Profiling in Shirane Pyrocrastic Cone, Kusatsu-Shirane Volcano

DOI Web Site 3 Citations 28 References
  • TSUTSUI Tomoki
    Akita University
  • ONIZAWA Shin'ya
    Volcanic Fluid Research Center, Tokyo Institute of Technology:(Present office)Geological Survey of Japan, AIST
  • MORI Takehiko
    Sakurajima Volcano Research Center, Disastaer Prevention Research Institute, Kyoto University:(Present office)Geological Survey of Japan, AIST
  • NOGAMI Kenji
    Volcanic Fluid Research Center, Tokyo Institute of Technology
  • HIRABAYASHI Jun'ichi
    Volcanic Fluid Research Center, Tokyo Institute of Technology
  • OGAWA Yasuo
    Volcanic Fluid Research Center, Tokyo Institute of Technology
  • TAKAGI Noriaki
    Volcanic Fluid Research Center, Tokyo Institute of Technology
  • SUZUKI Atsuo
    Usu Volcano Observatory, Hokkaido University
  • OIKAWA Jun
    Earthquake Research Institute, University of Tokyo
  • NAKAMICHI Haruhisa
    National Institute of Earth Science and Disaster prevention:(Present office)Research center for Seismology, Volcanology, and Disaster Mitigation, Graduate school of Nagoya University
  • YOSHIKAWA Shin
    Aso Volcanological Laboratory, Kyoto University
  • MATSUSHIMA Takeshi
    Institute of Seismology and Volcanology, Graduate school of Kyushu University

Bibliographic Information

Other Title
  • 草津白根火山白根火砕丘の地震反射断面 : 擬似反射記録法による反射断面の推定
  • クサツ シロネ カザン シロネ カサイキュウ ノ ジシン ハンシャ ダンメン ギジ ハンシャ キロクホウ ニ ヨル ハンシャ ダンメン ノ スイテイ

Search this article

Description

Shallow subsurface structure of Shirane pyrocrastic cone, Kusatsu-Shirane Volcano is discussed with Pseudo Reflection Profiling. Pseudo Reflection Profiles are obtained from a controlled source seismic experiment in September-October 2003 as a part of the Fourth Joint Observation of Kusatsu-Shirane Volcano. A significant horizon is defined through correlation of the profile with borehole logging data. The horizon is compatible with a top face of Tertiary volcanic rocks as a substratum of Kusatsu-Shirane Volcano and is estimated at 1700 m a. s. l. in the craters. The horizon strikes NNE-SSW direction and dips eastward. Its dipping is not uniform and there is a bench zone beneath the craters which strikes NNE-SSW direction. Seismicity beneath Mizugama crater is concentrated and the active magnetization region locates beneath the horizon. Other clear reflection events within the substratum are also observed in the profiles but their geological correlation is not defined. One of deeper horizon at 1000m a. s. l. may correlate a sort of density contrast in Tertiary volcanics layer. Seismicity along the traverse line tends to concentrate under the deeper horizon beneath Yugama crater. The density contrast may constrain seismicity beneath the crater.

Journal

Citations (3)*help

See more

References(28)*help

See more

Related Projects

See more

Keywords

Details 詳細情報について

Report a problem

Back to top