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How can a volcano change summer far away?

An eruption can affect people who never see the volcano. Tambora’s 1815 eruption helps explain why material reaching the atmosphere can alter sunlight and contribute to an unusually cold summer far away.

5–7 min

Questions you could explore

  • Which links in the chain connect an eruption to weather, and which require evidence about local people and crops?

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  • US Geological SurveyDo volcanoes affect weather?

    The transcript connects major eruptions with distant cooling and discusses the 1816 “year without a summer.” It is an atmospheric starting point, not a complete explanation of every regional hardship.

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