Question

A supervolcano that may have killed all but 10,000 humans resulted in what phenomenon, lasting up to a decade?

Answer 1

volcanic winter

A supervolcano eruption took place at Lake Toba in northern Sumatra about 75,000 years ago   Figure below  . This was the largest eruption in the past 25 million years. As much as 2,800 cubic kilometers of material was ejected into the atmosphere. The result was a 6- to 10-year volcanic winter. Some scientists think that only 10,000 humans survived worldwide. The numbers of other mammals also plummeted.