Volcanic calderas form when a magma
Position 1: Monitoring the temperature and chemical composition of these lakes therefore provides scientists with an early warning system for renewed eruptive activity.
Position 2: This process differs fundamentally from a typical summit eruption, in which lava flows outward rather than the cone imploding.
Position 3: Over subsequent centuries, calderas often fill with rainwater to create crater lakes, some of which remain volcanically active.
Position 4: Volcanic calderas form when a magma chamber beneath a volcano empties rapidly during an eruption, causing the overlying structure to collapse inward.
Position 5: The resulting depression can span tens of kilometres and reach depths of several hundred metres.
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