Shallow landslides occur frequently on the Aso volcanic mountains. The soil materials on the Aso volcanic mountains consist of tephra layers formed by volcanic activities. This study is aimed to specify the physical properties of soil that correlate with the sliding layer of a shallow landslide on the volcanic mountain area. Tephra layers consist of kuroboku and scoria layers and the differences between these layers were specified using the physical properties of soil methods. Results showed that the plasticity index and the fine fraction content can be used for estimating the sliding layer in the Aso volcanic area.

中文翻译：

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基于特非拉层物理性质的日本阿苏火山山浅层滑坡滑动层估算

在阿苏火山山脉上经常发生浅层滑坡。阿苏火山山的土壤物质由火山活动形成的特非拉层组成。这项研究旨在确定与火山山区浅层滑坡的滑动层相关的土壤物理性质。Tephra层由kuroboku和scoria层组成，这些层之间的差异是使用土壤方法的物理特性指定的。结果表明，可塑性指数和细颗粒含量可用于估算阿苏火山区的滑动层。