Uri Golman / Volcanic eruption near Eyjafjallajoekull glacier, ash and smoke exploding into the air, Iceland, 24/03/2010. Volcano dormant since 1821.

Uri Golman / Volcanic eruption near Eyjafjallajoekull glacier, Iceland, 24/03/2010. Volcano dormant since 1821.

Uri Golman / Volcanic eruption near Eyjafjallajoekull glacier, Iceland, 24/03/2010. Volcano dormant since 1821.

Morley Read / Reventador Volcano erupting at dawn, Ecuador, 2017. The mountain has been in a constant state of eruption since 2002. (non-ex)

Shane P. White / Tephra during volcanic eruption, Mount Yasur, Tanna Island, Vanuatu

Jeff Foott / Geyser spouting, Old Faithful, Yellowstone National Park, Wyoming

Sergey Gorshkov / Plume of volcanic ash lit by a basaltic lava flow from the Tolbachik volcano complex, Kamchatka, Far East Russia, eruption lasted from December 22nd 2012 through to January 2nd 2013

Sergey Gorshkov / Plume of volcanic ash lit by a basaltic lava flow from the Tolbachik volcano complex, Kamchatka, Far East Russia, eruption lasted from December 22nd 2012 through to January 2nd 2013

Sergey Gorshkov / Plume of volcanic ash lit by a basaltic lava flow from the Tolbachik volcano complex, Kamchatka, Far East Russia, eruption lasted from December 22nd 2012 through to January 2nd 2013.

Tui De Roy / Volcanic caldera - caldera lake steaming after eruption. Fernandina Island, Galapagos, Ecuador.

Juan Carlos Munoz / Wood of a tree burnt in a volcanic eruption of Mount Etna, Sicily, Italy

Sergey Gorshkov / Tolbachik Volcano erupting, Kamchatka, Russia