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Mexico's Popocatepetl Volcano Video Shows Intensity Of Smoke, Tremors
- 07/09/2013 09:55 AM EDT World
The Popocatepetl volcano in Mexico continued to fume on Monday after three days of smoke and ash that caused multiple airline delays. The alert level was raised to yellow, the third-highest on the seven-level scale. Officials say there have been more then 15 tremors and that big explosions are a possibility.