pyroclastic flow

fast-moving concentrated current of hot gas and volcanic matter that moves away from a volcano

en-GB/ˌpaɪɹəʊˈklɑːstɪk ˈfləʊ/
en-US/ˌpaɪɹəˈklæstɪk ˈfloʊ/

カテゴリ：

ash cloudpyroclastic density current