Another four-day cold snap hit eastern North America starting on July 6th. This time frosts killed the replanted crops, although it was not as snowy this time around. The price of flour rose from $4 a barrel to between $11 and $20 per barrel. About twice as many people decided to move west that year as was typical at that point.
The 2015 episode covers a volcano eruption in Sumbawa, Indonesia in 1816, that combined with several other factors to create an unusual -- and catastrophic -- series of weather events.
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