noun
volcanic eruption
Refers to the event of a volcano erupting. Used in news, scientific, and general contexts.
昨夜、火山噴火が発生した。
A volcanic eruption occurred last night.
火山噴火の予測は難しい。
Predicting volcanic eruptions is difficult.
噴火 is the general term for 'eruption' (of a volcano), while 火山噴火 explicitly includes 'volcano' for clarity or emphasis.
Compound of 火山 (volcano) and 噴火 (eruption).