[djf]

When Toba in Sumatra erupted 75,000 years ago, ocean temps worldwide plunged about 10 degrees F for over 2,000 years.


But AFAIK there has been no supervolcano events in the last 30,000 years to explain mammoth problems.

[blam]

"When Toba in Sumatra erupted 75,000 years ago, ocean temps worldwide plunged about 10 degrees F for over 2,000 years. "

Toba was the last super volcano event.

Late Pleostocene Human Population Bottlenecks. . . (Toba)