注水による溶岩流阻止の試み : 三宅島 1983 年噴火の例

概要

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Short-lived but active eruption of Miyakejima in October, 1983, produced a 2.5 km long basaltic lava flow which devastated 350 houses on the western coast. Following the example of Heimaey eruption in 1973 in Iceland, an attempt to control advancing lava flow near the shore line by chilling with sea water was made using portable pumps. About 4700 tons of sea water was sprayed over the 300 m long flow front of the lava for 3 days (16.5 hours net). However, the lava apparently had stopped before the watering operation began and there was practically no movement during the operation. Thus the effect of water spraying on the movement of lava flows was left uncertain. Nevertheless, the operation helped both the scientists and administration in providing many valuable informations on strategies, equipments, methods, etc. for future lava control operations.
特定非営利活動法人日本火山学会の論文
1984-12-28