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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.
Private tours on Etna volcano Discover Europe's largest active volcano on private, guided 1-day tours. Tours can be customized for different interests and fitness levels.
Batu Tara photos A remote island in the Flores Sea of Indonesia formed by a single volcano that has been in strong strombolian eruption for years. We regularly lead expeditions to there where we camp several days to observe it.
From Stromboli to Etna Get to know some of the most active and interesting volcanoes in the world: famous Mt. Etna on Sicily; Vulcano, in the Ancients'belief home to Vulcanus, God of Fire; Lipari with its spectacular obsidian and pumice deposits; and Stromboli, "Lighthouse of the Tyrrhenian Sea", known for its permanent fireworks!
Krakatoa explodes In the afternoon of 17 Oct, a particularly violent explosion occurred at Anak Krakatau, blasting away a portion of the southern crater rim. A similar event might have been the final trigger for the catastrophic landslide that let the cone collapse and cause a devastating tsunami on 22 Dec 2018.