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首页> 外文会议>Conference on Solutions to Coastal Disasters >VOLCANIC DEBRIS-AVALANCHE AS A CAUSE OF A HISTORIC TSUNAMI: THE AD 1640 ERUPTION OF THE HOKKAIDO-KOMAGATAKE VOLCANO, NORTHERN JAPAN
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VOLCANIC DEBRIS-AVALANCHE AS A CAUSE OF A HISTORIC TSUNAMI: THE AD 1640 ERUPTION OF THE HOKKAIDO-KOMAGATAKE VOLCANO, NORTHERN JAPAN

机译：火山碎瓶 - 雪崩作为历史悠久的海啸的原因：广告1640北海道 - Komagatake火山爆发，日本北部

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摘要

Sidescan sonar and sub-bottom reflection surveys off Shikabe town, along the Pacific coast, show the extent and volume of the submarine debris-avalanche deposit caused by the AD 1640 eruption of the Hokkaido-Komagatake volcano. The avalanche deposit extends from the subaerial part of the Shikabe lobe to as far as 20 km seaward. The subaqueous deposit, which reaches to 80 m of water depth, is 15 km wide and covers 126 km{sup}2 of the seafloor. Hummocks of the subaqueous deposit decrease in height and width with distance from the source. The margin of the deposit lacks hummocks. The ratio of the collapse height to the traveled distance (H/L) is 0.06, suggesting that the debris avalanche of origin was more mobile than those of most subaerial debris-avalanche deposits. The subaqueous volume of the avalanche deposits, estimated by extrapolating the pre-eruptive topography of the surrounding area, ranges from 0.92 to 1.20 km{sup}3.
机译：Sidescan Sonar和Sub-Botth Reflection调查了Shikabe Town，沿太平洋海岸，展示了由北海道 - Komagatake火山的广告1640爆发造成的潜艇碎片副矿床的程度和体积。雪崩沉积物从Shikabe叶片的底座部分延伸到到达20公里的海上。水管覆盖率达到80米，宽度为15公里，占地126公里{sup} 2。水管沉积物的木质沉积物的高度和宽度降低，距离源距离。押金的余量缺乏木头。坍塌高度与行驶距离（H / L）的比率为0.06，表明原产地的碎屑雪崩比大多数底栖碎片毛骨沉积物更多。通过推断周围区域的预发布地形，范围为0.92至1.20km {sup} 3来估计雪崩沉积物的亚基体积。

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