* Astronomy

On 24 May 1960, 38 hours after the main shock of the 1960 Valdivia earthquake, the largest earthquake recorded in history, Cordón Caulle began a rhyodacitic fissure eruption. 
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In volcanic terms, the ash and dust plume created by Puyehue-Cordon Caulle was modest, only reported to have reached a height of around 15 kilometres. Large explosions, such as the 1991 eruption of Mount Pinatubo in the Philippines, can create plumes in excess of 34 kilometres high and 400 kilometres wide, ejecting more than 17 million tons of aerosols.
But even as a modest eruption, the Chilean volcano could have ejected enough ash and dust into the stratosphere to have some long-term climatic effects, which could in turn affect agriculture and impact on human well-being and quality of life.
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Aerial footage of Chile's Puyehue volcano shows plumes of ash and smoke rising high into the sky, as air travel in large parts of South America, Australia and New Zealand remains disrupted.
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Chilean ash cloud clean-up underway

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