PHOTOS: World's Volcanoes Erupt

This photo, released by the Alaska Volcano Observatory/U.S. Geological Survey, shows the top vent in the Redoubt summit crater near Kenai, Alaska, March 21, 2009. The volcano erupted three times starting Sunday night, sending an ash cloud an estimated 50,000 feet into the air. The ash cloud is expected to reach the Susitna Valley, including Talkeetna and Willow about 90 miles north of Anchorage. Authorities said about six eruptions were detected between Sunday night and Monday night. The activity sent volcanic ash plumes more than nine miles into the air. The area is bracing for an ashfall, according to The Associated Press.

(Cyrus Read/Alaska Volcano Observatory/U.S. Geological Survey)

Astronauts on board the International Space Station were treated to this view of Sarychev volcano erupting June 12, 2009. The volcano is in Russia's Kuril islands, northeast of Japan. Sarychev Peak is one of the most active volcanoes in the chain of islands. The volcano last erupted in 1989. Commercial airline flights were diverted from the area to minimize the danger of engine failure from the intake of ash, according to NASA.

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