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

Erlend Haarberg / Volcanic eruption at Eyjafjallajokull with ash and lava exploding into the air at night, Iceland, May 2010

Erlend Haarberg / Volcanic eruption at Eyjafjallajokull with lightning in the ash plume, Iceland, April 2010

Erlend Haarberg / Subglacial volcanic eruption under the Eyjafjallajokull ice cap with northern lights above the ash plume at night, Iceland, April 2010

Orsolya Haarberg / Ash plume, white cloud and snowy ridge at the subglacial volcanic eruption under the Eyjafjallajokull ice cap in Iceland, April 2010. Second place in Landscape category of the GDT 2011 competition

Inaki Relanzon / Volcanic eruption, Eyjafjallajokull, near the Myrdalsjokull glacier, South Iceland, april 2010.

Inaki Relanzon / Volcanic eruption, Eyjafjallajokull, near the Myrdalsjokull glacier, South Iceland, april 2010.

Inaki Relanzon / Volcanic eruption, Eyjafjallajokull, near the Myrdalsjokull glacier, South Iceland, april 2010.

Inaki Relanzon / Volcanic eruption, Eyjafjallajokull, near the Myrdalsjokull glacier, South Iceland, april 2010.

Inaki Relanzon / Volcanic eruption, Eyjafjallajokull, near the Myrdalsjokull glacier, South Iceland, april 2010.

Orsolya Haarberg / Volcanic ash and lava eruption from the volcano under the Eyjafjallajokull ice cap, steam rises as the flowing lava interacts with glacier ice, Iceland, May 2010

Uri Golman / Volcanic eruption near Eyjafjallajoekull glacier, hot lava flowing down into the Thorsmork valley, Iceland, 24/03/2010. Volcano dormant since 1821.

Uri Golman / Volcanic eruption near Eyjafjallajoekull glacier, hot lava flowing down into the Thorsmork valley, Iceland, 24/03/2010. Volcano dormant since 1821.

Uri Golman / Helicopter flying over volcanic eruption near Eyjafjallajoekull glacier, Iceland, 24th March 2010. Volcano previously dormant since 1821.

Juan Carlos Munoz / Eyjafjallajökull volcano erupting, Fimmvörðuháls area, Iceland, 7th of April 2010

Stephen Belcher / Anak Krakatau erupting in May 2009, Ujung Kulon National Park, Sunda Strait, Indonesia

Yva Momatiuk & John Eastcott / Great Fountain Geyser erupting, Yellowstone National Park, Wyoming

Patricio Robles Gil / Yasur Volcano erupting, Tana Island, Vanuatu Archipelago, New Hebrides

Jabruson / Volcanic eruption of Kimanura volcano, 1989, Democratic Republic of Congo

Jabruson / Lava flow and corresponding fire moving through forest, Kimanura volcanic eruption, Virunga NP, Democratic Republic of Congo.

Jabruson / Lava explodes from active volcano, Kimanura eruption, Virunga NP, Democratic Republic of Congo (formerly Zaire)

Tim Fitzharris / Castle Geyser, Yellowstone National Park, Wyoming

Tui De Roy / Cerro Azul caldera with lake and tufa cone at 5,900 feet, Cerro Azul Volcano, Isabella Island, Galapagos Islands, Ecuador

Tui De Roy / Volcanic eruption, radial flank fissure, February 1979, lava fountaining from splatter cone at dusk, Cerro Azul, Isabella Island, Galapagos Islands, Ecuador

Tui De Roy / Volcanic eruption, spatter cone formation and lava fountain from radial fissure, February 1979, Cerro Azul east flank, Isabella Island, Galapagos Islands, Ecuador

Tui De Roy / Volcanic eruption, spatter cone formation and lava fountain from radial fissure, February 1979, Cerro Azul east flank, Isabella Island, Galapagos Islands, Ecuador

Tui De Roy / Volcanic eruption, spatter cone formation and lava fountain from radial fissure, February 1979, Cerro Azul east flank, Isabella Island, Galapagos Islands, Ecuador

Tui De Roy / Marine Iguana (Amblyrhynchus cristatus) with lava flow entering sea at night, Cape Hammond, Fernandina Island, Galapagos Islands, Ecuador

Tui De Roy / Mt Ruapehu eruption 1996, highest volcano on North Island, Ohakune, Tongariro National Park, New Zealand

Tui De Roy / Tungurahua Volcano erupting, near Banos, Andes Mountains, Ecuador

Jabruson / Lava flow destroying trees and vegetation. Kimanura volcano. Virunga NP, Democratic Republic of Congo.

Jabruson / Kimanura eruption, Virunga NP, Democratic Republic of Congo.

Jabruson / Volcanic eruption , Kimanura volcano, Virunga NP, Democratic Republic of Congo.

Jabruson / Kimanura eruption. Virunga NP active volcanic region, Democratic Republic of Congo.

Jabruson / Kimanura eruption. Virunga NP active volcanic region, Democratic Republic of Congo.

Jabruson / Kimanura eruption. Virunga NP, Rep of Congo (formerly Zaire), Central Africa

Juergen Freund / Siau volcano erupting with moon behind, N Sulawesi, Indonesia

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

JIM CLARE / Paramo and Cotopaxi volcano following recent eruption, with ash on the glaciers. Cotopaxi National Park. Andes, Ecuador.

Doug Perrine / Shimmering heat waves distort the image of diver as he samples erupting pillow lava at ocean entry of Kilauea Volcano, Hawaii Island.

Doug Perrine / Videographer filming pillow lava erupting underwater at Kilauea Volcano, Hawaii.

Doug Perrine / Diver shaping erupting pillow lava by hand to form underwater lava sculptures at ocean entry from Kilauea Volcano, Hawaii.

Doug Perrine / Diver sampling red hot pillow lava at underwater eruption of Kilauea Volcano, Hawaii.

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

Konrad Wothe / Cotopaxi volcano, National Park, Ecuador.

Ashley Cooper / Old British Antarctic Survey station, abandoned in 1967 when it was over run by a volcanic eruption. Deception Island, South Shetland Islands, Antarctic Peninsula.

Ashley Cooper / House which narrowly survived lava flow from eruption and formation of the volcano Eldfell on 23 January 1973. Heimaey town, Westmand Islands, Iceland. September 2010.

Doug Perrine / Palm trees in Leilani Community Park, silhouetted against the glow from fountaining lava at fissure 8, Kilauea Volcano, Leilani Estates subdivision, near Pahoa, Puna District, Hawaii. June 2018.

Doug Perrine / Fissure along the east rift zone of Kilauea Volcano, blasting lava bombs hundreds of meters into the air near a residence off Highway 132 between Pahoa and Kapoho in Puna District, Hawaii. The house w...

Doug Perrine / Lava from Kilauea Volcano erupts from fissures in Kapoho, shooting glowing lava bombs hundreds of meters into the sky and releasing clouds of poisonous gases. Puna District, near Pahoa, Hawaii. June 2...

Doug Perrine / Lava from Kilauea Volcano erupts from a fissure in Kapoho, Puna District, near Pahoa, Hawaii. June 2018.

Doug Perrine / Lava emanating from Pu'u O'o on Kilauea Volcano, glows from holes burned through Leilani Avenue, Leilani Estates, near Pahoa, Puna, Hawaii. June 2018.

Doug Perrine / River of lava entering the ocean at dusk. Ahalanui, Kapoho, Hawaii. This lava erupted from fissure 8 of the Kilauea Volcano, near Pahoa, Hawaii. June 2018.

Doug Perrine / Lava erupting from fissure 8 of the Kilauea Volcano, in Leilani Estates, near Pahoa, Hawaii. Here a river of lava flows through what was formerly a Papaya orchard in Kapoho, lower Puna District, Hawa...

Doug Perrine / 'Lava boat' or 'Lavaberg' (large chunk of partially hardened lava) floats down the lava river flowing through Kapoho, from Fissure 8 of the Kilauea Volcano, Puna District, Hawaii. June 2018.

Doug Perrine / 'Lava boat' or 'Lavaberg' (large chunk of partially hardened lava) floats down the lava river flowing through Kapoho, from Fissure 8 of the Kilauea Volcano, Puna District, Hawaii. June 2018.

Doug Perrine / Lava erupting from fissure 8 of the Kilauea Volcano, near Pahoa, flowing through what was formerly a papaya orchard in Kapoho, lower Puna District, Hawaii. June 2018.

Doug Perrine / River of lava erupting from fissure 8 of the Kilauea Volcano, near Pahoa, flowing through Kapoho, Puna District, Hawaii June 2018.

Doug Perrine / A'a lava flowing over land, where it has pushed down a house and set it on fire. The lava originated from Pu'u O'o, Kilauea Volcano, from a fissure in Leilani Estates, near Pahoa, Puna, Hawaii, USA....

Doug Perrine / A'a lava which originated from Pu'u O'o, Kilauea Volcano, from a fissure in Leilani Estates, near Pahoa, Puna, Hawaii, USA. June 2018.

Doug Perrine / Lava emanating from Pu'u O'o, Kilauea Volcano, erupting from multiple fissures in Leilani Estates, near Pahoa, Puna, Hawaii. The fissure in the lower part of the frame is Fissure 8, which became the d...

Lucas Bustamante / Cotopaxi Volcano with plume of ash from eruption, Cotopaxi National Park, Cotopaxi, Ecuador, August 2015.

Pete Oxford / Dried mud flow caused by volcanic eruption, Cotopaxi Volcano, Cotopaxi National Park, Andes, Ecuador

Kevin Schafer / Volcano erupting at night, Yasur Volcano, Tanna Island, Vanuatu

Kevin Schafer / Volcano erupting at night, Yasur Volcano, Tanna Island, Vanuatu

Winfried Wisniewski / Geyser erupting, Selfoss, Iceland, sequence 3 of 3

Winfried Wisniewski / Geyser erupting, Selfoss, Iceland, sequence 2 of 3

Winfried Wisniewski / Geyser erupting, Selfoss, Iceland, sequence 1 of 3

Winfried Wisniewski / Geyser erupting, Selfoss, Iceland, sequence 4 of 4

Winfried Wisniewski / Geyser erupting, Selfoss, Iceland, sequence 3 of 4

Winfried Wisniewski / Geyser erupting, Selfoss, Iceland, sequence 2 of 4

Winfried Wisniewski / Geyser erupting, Selfoss, Iceland, sequence 1 of 4

Enrique Lopez-Tapia / Ash cloud starting during eruption of Yasur volcano, Tanna Island, Vanuatu, September 2008.

Enrique Lopez-Tapia / Ash cloud starting during eruption of Yasur volcano, Tanna Island, Vanuatu, September 2008.

Enrique Lopez-Tapia / Ash cloud from eruption of Yasur volcano, Tanna Island, Vanuatu, September 2008.

Enrique Lopez-Tapia / Ash cloud from eruption of Yasur volcano, Tanna Island, Vanuatu, September 2008.

Enrique Lopez-Tapia / Ash cloud from eruption of Yasur volcano, Tanna Island, Vanuatu, September 2008.

Enrique Lopez-Tapia / Ash cloud from eruption of Yasur volcano, Tanna Island, Vanuatu, September 2008.

Enrique Lopez-Tapia / Ash cloud from eruption of Yasur volcano, Tanna Island, Vanuatu, September 2008.

Enrique Lopez-Tapia / Ash cloud from eruption of Yasur volcano, Tanna Island, Vanuatu, September 2008.

Enrique Lopez-Tapia / Ash cloud from eruption of Yasur volcano, Tanna Island, Vanuatu, September 2008.

Enrique Lopez-Tapia / Ash cloud from eruption of Yasur volcano, Tanna Island, Vanuatu, September 2008.

Enrique Lopez-Tapia / Ash cloud from eruption of Yasur volcano, Tanna Island, Vanuatu, September 2008.

Enrique Lopez-Tapia / Ash cloud from eruption of Yasur volcano, Tanna Island, Vanuatu, September 2008.

Enrique Lopez-Tapia / Ash cloud from eruption of Yasur volcano, Tanna Island, Vanuatu, September 2008.