Increase in Magnitude for VEI Numbers
	VEI 0 =	100 =	1
	1 =	101 =	10
	2 =	102 =	100
	3 =	103 =	1,000
	4 =	104 =	10,000
	5 =	105 =	100,000
	6 =	106 =	1,000,000
	7 =	107 =	10,000,000
	8 =	108 =	100,000,000

The numbers 0 through 8 represent a scale of increasing volcanic explosivity. Each interval approximately increases by a factor of ten. That means an eruption with a VEI of 6 is roughly ten times more explosive than an eruption rated 5 and roughly ten times less explosive than an eruption rated 7. (The Richter scale works the same way.)

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