Debris avalanche and lahar deposits in the Yatsugatake volcanic chain and Myoko volcano group, central Japan

日本中部八岳火山链和妙高火山群的碎片雪崩和火山泥沉积物

• 批准号: 05680361
• 负责人: KAWACHI Shimpei
• 金额: $ 1.09万
• 依托单位: Shinshu University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1993
• 资助国家: 日本
• 起止时间: 1993 至 1994
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-05680361/
• 关键词: debris avalanche; lahar; frequency; steam explosion; earthquake shock; Yatsugatake; Myoko; ラハール; 妙高

On the basis of the characteristis of 14 debris avalanche and 4 lahar deposits in the Yatsugatake volcanic chain and Myoko volcano group of central Japan, the frequency of occurrences were evaluated.Number of deposits larger than 0.01km^3 occurred five times during the last 10,000 years in both volcano groups. This suggests that the potential of occurrence of a large-scale collapse deposits once per 2,000 years on average. No activity is expected to occur for quite some tim in the Yatsugatake volcanic chain, whereas Myoko volcano group, it should be noted that the latest evevt occurred 2,700 years ago.

根据日本中部八岳火山链和妙高火山群中14个岩屑崩落和4个拉哈尔沉积的特征，对它们的出现频率进行了评价，在这两个火山群中，在过去的1万年中，大于0.01km^3的沉积物共出现了5次。这表明，发生大规模崩塌的可能性平均每2,000年沉积一次。八岳火山链预计在相当长的一段时间内不会发生任何活动，而Myoko火山群，应该注意的是，最近的一次活动发生在2,700年前。

项目成果

Shimpei KAWACHI & Kenji HAYATSU: "Debris avalanche and lahar deposits in the Yatsugatake volcanic chain and Myoko volcano group,central Japan" Jour.Natural Disaster Sci.17(in press).

河内真平

Shinpei KAWACHI & Kenji HAYATSU: "Debris avalanche and lahar deposits in the Yatsugatake volcanic chain and Myoko volcano group, central Japan." Jour.Natural Disaster Sci.17(in press).

河内新平

Shimpei KAWACHI & Kenji HAYATSU: "Debris avalanche and lahar deposits in the Yatsugatake volcanic chain and the Myoko volcano group,central Japan" Jour.Disaster Science. 16. (1994)

河内真平

河内 晋平: "「大地が語る信州の千億年」" 郷土出版, 263 (1994)

河内新平：“‘大地讲述的信州一千亿年’”共同社，263（1994）

河内晋平: "信州の火山「大地が語る信州の4億年」" 郷土出版, 263 (1994)

河内新平：“信州的火山：大地讲述的信州四亿年”共同社，263（1994）