A volcano can pass entire generations without removing lava or ashes and suddenly begin to show signs of activity. So, when we talk about “sleep” volcanoes, the word is quite correct: a long pause does not necessarily mean that its eruptive history is over. Under many volcanoes there is a complex system where the magma can be stored at miles of depth. During periods of calm, that material loses heat, crystallizes partially and can be transformed…
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A volcano can pass entire generations without removing lava or ashes and suddenly begin to show signs of activity. So, when we talk about “sleep” volcanoes, the word is quite correct: a long pause does not necessarily mean that its eruptive history is over. Under many volcanoes there is a complex system where the magma can be stored at miles of depth. During periods of calm, that material loses heat, crystallizes partially and can be transformed…