Is a volcano big enough to cause an ice age really about to blow its top?

BreakthroughAlert.com: Is a volcano big enough to cause an ice age really about to blow its top?:

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~ Latest Flash (12/31 9:48AM): level of seismic activity still increasing ~ The most potentially destructive volcano on earth, the Yellowstone Caldera in Wyoming (see map), has recently begun experiencing an unusually strong and persistent earthquake swarm that has scientist concerned because it might indicate an impending eruption (see Today's Seismogram Display). Yellowstone is labeled a super volcano, because the pool of magma under the ground is a stunning 34 miles x 45 miles in size. Large enough that an eruption is expected to eject sufficient material to plunge the entire planet into a new ice age. The ridge shown in the photo is the rim of the huge caldera from the last eruption. Ash recovered from sediment over wide areas of North America shows that Yellowstone has had previous super volcanic eruptions 2.1 million, 1.3 million and 640,000 years ago."