isnt it in yellowstone national park?

If it's an active volcano, it would be Kilauea in Hawaii

Steve. Steve the Volcano

Yellowstone is the worlds largest active volcano. All the hotsprings, and geysers are a direct result.

Just for fun:)

1) "Mauna Loa (pronounced /ËŒmɔːnÉ™ ˈloÊŠÉ™/ or /ËŒmaÊŠnÉ™ ˈloÊŠÉ™/ in English, [ˈmounÉ™ ˈloÉ™] in Hawaiian) is the largest volcano on earth and one of five volcanoes that form the Island of Hawaii in the U.S. state of HawaiÊ»i in the Pacific Ocean. It is an active shield volcano, with a volume estimated at approximately 18,000 cubic miles (75,000 km³), although its peak is about 120 feet (37 m) lower than that of its neighbor, Mauna Kea. The Hawaiian name "Mauna Loa" means "Long Mountain". Lava eruptions from Mauna Loa are silica-poor, thus very fluid: and as a result eruptions tend to be non-explosive and the volcano has extremely shallow slopes." Source and further information: http://en.wikipedia.org/wiki/Mauna_Loa 2) "The Yellowstone Caldera is the volcanic caldera in Yellowstone National Park in the United States. The caldera is located in the northwest corner of Wyoming, in which the vast majority of the park is contained. The major features of the caldera measure about 55 kilometers (34 mi) by 72 kilometers (45 mi) as determined by geological field work conducted by Bob Christiansen of the United States Geological Survey in the 1960s and 1970s. After a BBC television science program coined the term supervolcano in 2000, it has often been referred to as the Yellowstone Supervolcano." "The loosely-defined term 'supervolcano' has been used to describe volcanic fields that produce exceptionally-large volcanic eruptions. Thus defined, the Yellowstone Supervolcano is the volcanic field which produced the latest three supereruptions from the Yellowstone hotspot. The three super eruptions occurred 2.1 million, 1.3 million and 640,000 years ago; forming the Island Park Caldera, the Henry's Fork Caldera, and Yellowstone calderas, respectively[5]. The Island Park Caldera supereruption that produced the Huckleberry Ridge Tuff was the largest and produced 2,500 times as much ash as the 1980 Mount St. Helens eruption. The second largest supereruption formed the Yellowstone Caldera and produced the Lava Creek Tuff. The Henry's Fork Caldera produced the smaller Mesa Falls Tuff but is the only caldera from the SRPY hotspot that is plainly visible today. Non-explosive eruptions of lava and less violent explosive eruptions have occurred in and near the Yellowstone caldera since the last supereruption. The most recent lava flow occurred about 70,000 years ago while the largest violent eruption excavated the West Thumb of Lake Yellowstone around 150,000 years ago. Smaller steam explosions occur as well; an explosion 13,800 years ago left a 5 kilometer diameter crater at Mary Bay on the edge of Yellowstone Lake (located in the center of the caldera). Currently, volcanic activity is exhibited only via numerous geothermal vents scattered throughout the region, including the famous Old Faithful Geyser. The volcanic eruptions, as well as the continuing geothermal activity, are a result of a large chamber of magma located below the caldera's surface. The magma in this chamber contains gases that are kept dissolved only by the immense pressure that the magma is under. If the pressure is released to a sufficient degree by some geological shift, then some of the gases bubble out and cause the magma to expand. This can cause a runaway reaction. If the expansion results in further relief of pressure, for example, by blowing crust material off the top of the chamber, the result is a very large gas explosion." Source and further information: http://en.wikipedia.org/wiki/Yellowstone_caldera 3) "Known super eruptions Estimates of the volume of ejected material are given in parentheses. VEI 8 eruptions have happened in the following locations. Lake Taupo, North Island, New Zealand - Oruanui eruption ~26,500 years ago (~1,170 km3) Lake Toba, Sumatra, Indonesia - ~75,000 years ago (~2,800 km3) Whakamaru, North Island, New Zealand - Whakamaru Ignimbrite/Mount Curl Tephra ~254,000 years ago (1,200-2,000 km3)[6] Yellowstone Caldera, Wyoming, United States - 640,000 years ago (1,000 km3) Island Park Caldera, Idaho/Wyoming, United States - 2.1 million years ago(2,500 km3) Kilgore Tuff, Idaho, United States - 4.5 million years ago (1,800 km3) Black Tail Creek, Idaho, United States - 6.6 million years ago (1,500 km3) La Garita Caldera, Colorado, United States - Source of the truly enormous eruption of the Fish Canyon Tuff ~27.8 million years ago (~5,000 km3) The Lake Toba eruption plunged the Earth into a volcanic winter, eradicating an estimated 60% of the human population (although humans managed to survive, even in the vicinity of the volcano), and was responsible for the formation of sulfuric acid in the atmosphere." Source and further information: http://en.wikipedia.org/wiki/Supervolcano

Mona Loa in Hawaii would be my guess.