9 Months Ago, Great Falls Tribune says (in Geologists witness rare hydrothermal explosion in Yellowstone ...)  MT
By ANGUS M. THUERMER The Jackson Hole News & Guide • May 27, 2009 YELLOWSTONE NATIONAL PARK, Wyo. (AP) — Yellowstone National Park geologist Hank Heasler was lecturing a group of colleagues in Biscuit Basin on the rarity of hydrothermal explosions ...

And jhnewsandguide.com says (in Teton, Yellowstone among most visited)  WY
Grand Teton and Yellowstone national parks made this year's list of the 10 most visited national parks, according to National Park Service statistics. Combined, the two parks welcomed roughly 5.5 million visitors in 2008, or about 2 percent of the ...

And Yellowstone Insider says (in Explosion rocks Biscuit Basin) KFBB NewsChannel 5
 MN
Hydrothermal explostions aren't rare in Yellowstone National Park: you can expect one every few years. And they have the potential to dramatically reshape the landscape; longtime visitors will remember the explosion of Porkchop Geyser in 1989 that ...

And Jackson Hole says (in Geology group treated to rare pool explosion)  WY
Yellowstone National Park geologist Hank Heasler was lecturing a group of colleagues in Biscuit Basin on the rarity of hydrothermal explosions last week when – Boom! A hot pool behind him exploded, spewing mud, rocks and hot water 50 feet in the air. ...