Milan Radisics / Aerial shot of rootless cones or pseudocraters, formed by steam explosions as flowing hot lava crosses over a wet surface, South Iceland, August 2018.

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

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

Ingo Arndt / Close up of exploding lava as Stromboli volcano erupts, Italy, Europe

Doug Perrine / Hot lava from the 61G flow, emanating from Pu'u O'o on Kilauea Volcano, flows over sea cliffs into the ocean under the stars and moon, Kamokuna, Kalapana, Hawaii Volcanoes National Park, Puna, Hawaii...

Vincent Grafhorst / Man looking into crater at night, Mount Nyiragongo, Virunga National Park, Democratic Republic of the Congo

Vincent Grafhorst / Lava in volcanic crater, Mount Nyiragongo, Virunga National Park, Democratic Republic of the Congo

Enrique Lopez-Tapia / Travelers watching lava on Erta Ale volcano crater. Afar Region, Ethiopia, Africa. November 2014.

Christophe Courteau / Lava Lake at night in the crater of Nyiragongo Volcano, Virunga National Park, North Kivu Province, Democratic Republic of Congo. September 2015.

Christophe Courteau / Lava Lake at night in the crater of Nyiragongo Volcano, Virunga National Park, North Kivu Province, Democratic Republic of Congo. September 2015.

Pedro Narra / Scientists observing lava and ash plume erupting from Fogo Volcano, Fogo Island, Cape Verde, 29th November 2014.

Doug Perrine / Red hot lava from Kilauea Volcano flowing into ocean at West Kailiili, Hawaii Volcanoes National Park, Big Island, Hawaiian Islands, USA.