Stratigraphy and distribution pattern of volcanogenic sediments beneath downtown Mashiki, Kumamoto, SW Japan, seriously damaged by the 2016 Kumamoto Earthquake
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- Nakazawa Tsutomu
- Geological Survey of Japan, AIST
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- Sakata Kentaro
- Geological Survey of Japan, AIST
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- Sato Yoshiki
- Geological Survey of Japan, AIST
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- Hoshizumi Hideo
- Geological Survey of Japan, AIST
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- Urabe Atsushi
- Research Institute for Natural Hazards and Disaster Recovery, Niigata University
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- Yoshimi Masayuki
- Geological Survey of Japan, AIST
Bibliographic Information
- Other Title
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- 2016年熊本地震で甚大な被害を受けた益城町市街地の地下を構成する火山性堆積物の層序と分布形態
- 2016ネン クマモト ジシン デ ジンダイ ナ ヒガイ オ ウケタ マシキマチ シガイチ ノ チカ オ コウセイ スル カザンセイ タイセキブツ ノ ソウ ジョ ト ブンプ ケイタイ
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Abstract
<p>The 2016 Kumamoto Earthquake resulted in severe damage to houses and buildings, particularly in the central part of Mashiki Town, Kumamoto Prefecture, SW Japan. We examined drill core and standard penetration test (SPT) samples obtained from the severely damaged area to understand the influence of the underlying geology on damage caused by strong earthquake motion. The downtown Mashiki area is underlain by thick volcanogenic sediments derived from Aso volcano, comprising the Aso-3 pyroclastic flow, the Aso-4/3 interval, the Aso-4 pyroclastic flow, lahar, and loess deposits, in ascending order. The stratigraphic correlation of several boreholes in Mashiki Town reveals that the severely damaged area is characterized by a thicker fine-grained pumice bed of the Aso-4 pyroclastic flow and overlying weathered lahar deposits saturated with groundwater.</p>
Journal
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- The Journal of the Geological Society of Japan
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The Journal of the Geological Society of Japan 124 (5), 347-359, 2018-05-15
The Geological Society of Japan
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Keywords
Details 詳細情報について
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- CRID
- 1390564237992785280
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- NII Article ID
- 130007413114
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- NII Book ID
- AN00141768
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- ISSN
- 13499963
- 00167630
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- NDL BIB ID
- 029103334
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
- KAKEN
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- Abstract License Flag
- Disallowed