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Divergent plate boundaries in oceans Two ocean plates move apart from each other. Hot upwelling mantle material forms magmas that continuously produce new oceanic crust. An ocean widens.
Earthquakes near Volcanoes Our world-wide map continuously detects shallow earthquakes near volcanoes. These could be early signs of unrest and often precede eruptions.
Etna trekking tour A tour entirely dedicated to Etna, the most active volcano in Europe. Spend 6 full days on Etna and get good chances to see eruptive activity.