An eruption in which a volcano expels magma, ash, and gases; a volcanic eruption.
昨夜、近くの火山が噴火し、多くの住民が避難した。
Last night, a nearby volcano erupted and many residents evacuated.
噴火の予兆を観測するためにセンサーを設置した。
Sensors were installed to observe signs of a possible eruption.
噴火で火山灰が降り、空港が一時閉鎖された。
Ash fell due to the eruption, and the airport was temporarily closed.