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Scientists have finally identified the mysterious 'mystery eruption' that caused the 'blue, purple, and green' Sun in 1831

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Scientists at the University of St Andrews in Scotland have pinpointed a volcanic eruption from the Zavaritskii caldera on the uninhabited island of Simushir , part of the Kuril Islands in the Russian Far East, not too far from Japan .

In August 1831 , reports emerged from around the world including China , Europe , the US , and the Caribbean of the Sun appearing "blue, purple, and green".