A disaster caused by human actions or errors (man-made disaster), as opposed to natural disasters like earthquakes or typhoons.
化学プラントの爆発は人為災害として長時間にわたる調査が行われた。
The chemical plant explosion was treated as a man-made disaster and investigated for a long time.
人為災害を防ぐためには安全教育と手順の徹底が重要だ。
Preventing man-made disasters requires thorough safety training and procedures.
事故調査の結果、原因は人為災害と断定された。
As a result of the accident investigation, the cause was determined to be a man-made disaster.