Several days ago, a volcano that had been dormant for 
9,000 years near the coast of Chile erupted spectacularly, 
hurling liquified metals and lightning many miles into 
the sky.  The results, which you will see is called a 
'dirty thunderstorm,' and are quite rare. 

Nobody is certain what causes them, but according to 
National Geographic it's believed to be 'the result of 
rock fragments, ash, and ice particles in the plume 
colliding to produce static charges just as ice particles 
collide to create charge in regular thunderstorms.'

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