Mount St Helens erupts

The big eruption on 18 May 1980 actually began two months earlier, with small earthquakes and eruptions from mid-March. On the day itself, a larger earthquake made part of the mountain collapse, triggering the largest known landslide (a mass movement of rock and earth down a slope) in history. Afterwards, rock, ash, gas and steam exploded outwards. Bridges, homes and farmland were destroyed, along with 600 square kilometres of forest. It wasn’t the biggest eruption in the volcano’s history but modern techniques meant experts could study it thoroughly.…

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The Week Junior (UK) (Digital) - 1 Issue, 467

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