Lightning strikes during a volcanic eruption of Galunggung in West, Java, Indonesia. [Link to this slide]
© CORBIS

Gas and steam rise from Chile's Chaitén volcano, which has also started to spew lava near the city of Chaitén, 760 miles (1,220 kilometers) south of the capital, Santiago....[More]

Gas and steam rise from Chile's Chaitén volcano, which has also started to spew lava near the city of Chaitén, 760 miles (1,220 kilometers) south of the capital, Santiago. At the moment, about 8,000 of the 12,000 inhabitants of the municipalities Chaitén, Futaleufú and Palena have been evacuated due to the eruption.  [Less] [Link to this slide]

© Daniel Basualto/epa/Corbis

View of the Nyiragongo volcano, located inside Virunga National Park. Mount Nyiragongo is one of the most famous volcanoes in Africa and one of eight in the Virunga Mountains, located in the Democratic Republic of Congo near the town of Goma in eastern part of the country....[More]

View of the Nyiragongo volcano, located inside Virunga National Park. Mount Nyiragongo is one of the most famous volcanoes in Africa and one of eight in the Virunga Mountains, located in the Democratic Republic of Congo near the town of Goma in eastern part of the country. The summit is 6,560 feet (2,000 meters) above the level of Lake Kivu. On January 17, 2002, a major eruption began at Nyiragongo Volcano, with lava flows reaching the city of Goma, displacing 500,000 people.  [Less] [Link to this slide]

© Dominique Derda/France 2 /Corbis

Mount Vesuvius Erupting The eruption of Mount Vesuvius, Italy. [Link to this slide]
© Bettmann/CORBIS

Steam Rises from Volcano on New Zealand's White Island [Link to this slide]
© Cordaiy Photo Library Ltd./CORBIS

Mount Semeru spews smoke a day after the nearby Mount Bromo volcano erupted, killing two people, some 45 miles (75 kilometers) south of Surabaya, the capital of East Java and Indonesia's second largest city....[More]

Mount Semeru spews smoke a day after the nearby Mount Bromo volcano erupted, killing two people, some 45 miles (75 kilometers) south of Surabaya, the capital of East Java and Indonesia's second largest city. Two tourists, one an Indonesian and the other from Singapore, were killed and five others injured when Mount Bromo, a popular tourist destination, hurled rocks the size of footballs. Indonesia sits astride the geologically active Pacific "ring of fire". This archipelago nation has more than 100 active volcanoes.  [Less] [Link to this slide]

© Darren Whiteside/Reuters/Corbis

Mount Saint Helens emits a plume of steam and ash on October 1, 2004, from an area of new crevasses in the crater glacier south of the lava dome that grew between the 1980 eruption and 1986....[More]

Mount Saint Helens emits a plume of steam and ash on October 1, 2004, from an area of new crevasses in the crater glacier south of the lava dome that grew between the 1980 eruption and 1986. The event lasted approximately 25 minutes and created a pale gray cloud that reached an altitude of almost 10,000 feet (3,050 meters). The image was taken at an altitude of 27,000 feet (8,230 meters) aboard a U.S. Navy P-3C Orion aircraft assigned to the "Screaming Eagles" of Patrol Squadron One (VP-1) stationed at Naval Air Station, Whidbey Island, Washington State.  [Less] [Link to this slide]

© Scott Taylor/CNP/Corbis

Houses engulfed by lava and ash pushed into the street following an eruption of Heimaey Volcano on the Icelandic island of Vestmannaeyjar. Ash and lava continue to belch from the volcano behind. [Link to this slide]
© Sigurgeir Jonasson; Frank Lane Picture Agency/CORBIS

Pahoehoe lava flows from an erupting Kilauea on Hawaii Island. [Link to this slide]
© Paul A. Souders/CORBIS

Phreatic explosion of Guagua Pichincha on the morning of October 7, 1999. Photographed from the city of Quito, Ecuador. [Link to this slide]
© Pablo Corral Vega/CORBIS