I am going from memory, but I think there was a very major eruption of Vesuvius around 25kya. Also there are volcanic intrusive pillars in France from around that time. Around 22kya there was a major eruption of SakaruJima (sp?) in Japan which left a crater about 11 miles in diameter. There is still an active volcano at the edge of that ocean filled crater.
The most recent cold/warm cycle started around 125,000 years ago. Around 75kya there was a huge eruption (I think Indonesia) which left a crater about 18 by 65 miles in diameter. This caused a number of years of fatal winter weather. Some scientists say the human breeding population was reduced to around 10,000 people. I have noticed that findings of human activity finally began to show up again around 50kya, For example people moving to Australia, since the water levels were much lower then and open water areas were much smaller and thus could be crossed by rafts.
Around 75kya there was a huge eruption (I think Indonesia) which left a crater about 18 by 65 miles in diameter.
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Mt. Toba.