Old Faithful geyser erupts in Yellowstone National Park, Wyoming, USA.
The famous cone geyser of Old Faithful erupts in Yellowstone National Park, Wyoming, USA. Old Faithful shoots up to 185 feet high, averaging 145 feet high, about every 90 minutes. Old Faithful is powered by boiling groundwater heated by a hotspot of light, hot, molten mantle rock near the surface. 640,000 years ago, a supereruption of the Yellowstone Supervolcano created the Yellowstone Caldera which measures 34 miles (55 km) by 45 miles (72 km). Any time in the next few hundred millennia, the active volcano of Yellowstone threatens vast destruction in North America and modification of world climate. Yellowstone was the first national park in the world (1872), and UNESCO honored it as a World Heritage site in 1978.Add to Cart Add to Lightbox Download