noun
explosive eruption
Technical term in volcanology for a violent volcanic eruption that ejects ash, gas, and pyroclastic material.
桜島では爆発的噴火が頻繁に観測されている。
Explosive eruptions are frequently observed at Sakurajima.
この火山は過去に大規模な爆発的噴火を起こした。
This volcano has caused large-scale explosive eruptions in the past.
Compound of 爆発的 (explosive) + 噴火 (eruption). The exact historical derivation is uncertain, but the term is a straightforward technical compound.