Volcano on Argentina and Chile Border Prompts Red Alert


Lava spewing from the Copahue volcano, located on the Chilean-Argentine border, are seen from Caviahue in the Argentina Patagonian province of Neuquen December 24, 2012. The volcano's constant activity prompted the provincial emergency committee (COE) network to issue a routinary emergency operation in the closest Argentine localities to the volcano. Chilean authorities have declared red alert at the area of "Alto Biobio" but not to the point of calling for evacuations Gonzalo Arroyo, the regional director of the Chilean National Emergency Office said. REUTERS/Antonio Huglich (ARGENTINA - Tags: DISASTER ENVIRONMENT) - RTR3BVO5



Our Geo Quiz takes us down to the southern reaches of the Andes.

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That's a long way down, since the Andes run more than 4,000 miles along the Pacific coast of South America.

And near the southern end, there's a volcano we want you to name.

It has a massive crater lake at the summit containing highly acidic, toxic waters.

That explains why its name in the indigenous Mapuche language means sulfur waters.

The volcano has scientists worried right now. It's been generating thousands of tremors in recent days.

And there are fears of a possible explosive eruption. Authorities in both Chile and Argentina have issued a red alert.

Don't panic – we just want you to name the volcano.

The answer is Copahue, a stratovolcano nestled on the border between Argentina and Chile.