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The Cumbre Vieja volcano of La Palma Island, Spain, started to erupt 3 months ago.

This week, the volcano stopped emitting lava and there remains only degassing processes. According to this news story, the Spanish National Geographic Institute (IGN) plans to declare the end of the eruption on 25th December if no more activity occurs.

That make me wonder: what determines the end of a volcanic eruption and how can it be predicted?

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