Popo May Contain Huge Lava Mass
Popocatepetl rumbled for 4 minutes on Saturday, then spewed ash on nearby communities. Residents had all returned home after being evacuated on December 18, when showers of red-hot rock began shooting out of the volcano. This was its biggest eruption in 1,200 years.
Scientists say that the volcano is trying to dislodge a mass of lava that is stuck deep in its crater. They expect it to continue erupting for several weeks. The ash could further pollute the air in Mexico City, which already has one of the worst air quality levels in the world, and even effect the southwest United States. It could also contaminate the underground water supply of one of the world?s largest cities.
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