Pete Oxford / Snow-covered Chimborazo Volcano, Ecuador

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

Colin Monteath / Mount Taranaki reflected in small tarn on slopes of Pouakai Range, New Zealand

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

Ingo Arndt / Mikeno Volcano (3634 meters) with lenticular cloud, Republic of the Congo in the Virunga heartland, view from Rwanda

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

Igor Shpilenok / Kluchevskoy Volcano, the highest volcano in Eurasia, flanked by volcanos Plosky (flat) Tolbachik and Ostry (sharp) Tolbachik. Kluchevskoy Nature Reserve, Central Kamchatka. .

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