This is a Super Volcano not your garden variety Mt St. Helens (explosive index=5) or (explosive index=6) or 1991 Mt Pinatubo eruption (explosive index=6 - 5 cubic kilometres of rock and 15-30 million tons of sulfur dioxide gas.
The Toba eruption was the largest disturbance of the stratosphere since the eruption of Krakatau in 1883. The average temperature in the Northern Hemisphere was reduced 0.5 to 0.6C (degrees) and the entire planet was cooled 0.4 to 0.5C (degrees). The maximum reduction in global temperature occurred in August 1992 with a reduction of 0.73 (degrees).
Toba was a 10 or better on the index. The crater is 60 X 100 km. The ash total is part of the larger 3,000 cu/km of ejected material.
1815 Tambora (explosive index=7 - "the year without a summer") 150 cu/km of rock, 200 million tons of aerosols.
1983 Mt St Helens eruption (.02 cu/km ).
Toba's plume is estimated to have reached 34 km high and 1 trillion tons of aerosols (including 200,000,000 tons of sulfur dioxide - SO2). The ash covered India between 1 and 6 meters deep. 6 year period during which the largest amount of volcanic sulphur was deposited in the past 110,000 years. Sea level was 160 feet below current.
There was also a 1000 year ice age right after - temps fell 12 degrees C. world wide.
If you are young enough, maybe you will have the misfortune to hear the overdue Yellowstone Super Volcano go off - won't matter where in the world you are - you will hear it. And that will make Toba look like a firecracker. And once again the human genome will be reduced - if any survive at all...