Aberfenas katastrofa notika nepārdomātas cilvēku darbības rezultātā. Kalnainā apkaimē, kurā notika ogļu ieguve, virs pilsētiņas atrašānās vietas, pakalnā tika izveidots karjers ūdens un dubļu glabāšanai. Neizturot slodzi, dambis ap karjeru tika pārrauts un dažu minūšu laikā 40,000 kub.m. dubļu pārklāja pilsētiņu, tai skaitā sākumskolu.

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