Some volcanic eruptions are quiet and others are violent what causes this difference?

Volcanoes that produce explosive eruptions tend to have thicker, more viscous magma, and a greater volume of gas. Different types of volcanoes tend to produce different types of eruptions. Shield volcanoes, those with broad, gentle slopes, produce the quietest eruptions. The main difference is the shape of the volcano. 

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kwrob

How many calories in food

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