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Starting in 1812 and presumably through 1813 Mount Tambora show its first signs of activity, producing earthquakes and releasing some ash and gas.

The main event happened in April of 1815 when a series of eruptions, culminating in the largest volcanic eruption in recorded history. The material released by the eruption lowered global temperatures, leading to what people in Europe and North America called the "year without a summer."

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12y ago

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