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Photos: Ecuador's Tungurahua volcano

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Smoke rises from the Tungurahua volcano in Huambalo, Ecuador, on Tuesday, August 21. Increased volcanic activity has led authorities to raise a security alert from moderate to high. The volcano is 87 miles (140 kilometers) south of Quito, Ecuador's capital. <a href='http://ireport.cnn.com/topics/293965'>Are you there? Send us your pictures and video.</a>

Smoke rises from the Tungurahua volcano in Huambalo, Ecuador, on Tuesday, August 21. Increased volcanic activity has led authorities to raise a security alert from moderate to high. The volcano is 87 miles (140 kilometers) south of Quito, Ecuador's capital. Are you there? Send us your pictures and video.