The Ring of Fire has 452 volcanoes of which 50 each year.
There are more than 1,500 potentially active volcanoes on earth.
Puyehue Cordon Caulle Volcanic Complex emitted a pale plume of gas and ash on August 18, 2011.
Activity started on June 4, 2011.
Signs of an older eruption are visible to the southwest (lower left) of the fresh lava.
The thick steam is brighter white than the surrounding lower-altitude clouds.
Vegetation is green, as is Lake Letas.
Another image of the Eyjafjallajokull Volcano.
Despite no reports of activity, Bezymianny Volcano exhibited a modest plume on November 25, 2009.
The white color and absence of visible ash on the snow-covered peak suggest that the plume is mostly steam.
A striking shadow cast by the plume darkens the southern flank of neighboring Kamen Volcano.
These pyroclastic flows are among the major hazards created by Soufriere Hills.
This natural-color satellite image shows the major drainages on the southern and eastern sides of Soufriere Hills.
Green vegetation survives on ridges between valleys.
Eritreas Nabro Volcano on June 12, 2011.
As the eruption of Puyehue Cordon Caulle wanes, life is returning to normal in nearby communities.
Bariloche is an Andean town about 60 kilometers southeast of the eruption center.
On March 29, 2007, the Sheveluch (Shiveluch) Volcano on the Russian Federations Kamchatka Peninsula erupted.
Ash plumes from two of these volcanoes are visible in this natural-color satellite image.
90 kilometers (60 miles) to the southwest a much smaller plume escapes from Bezymianny.
The ash cloud was produced by vigorous lava fountaining at the New Southeast Crater.
