Yellowstone Park shaken by hundreds of earthquakes

The Telegraph newspaper, on the 31st of December 2008, reports on the increase of earthquakes around Yellowstone which may point to a possible eruption.

Scientists are monitoring a cluster of earthquakes that have rattled Yellowstone National Park over the past few days amid concerns that a larger earthquake could be brewing.

While earthquakes are common in the giant park, which covers parts of Wyoming, Idaho and Montana and experiences about 1,000 to 2,000 tremors a year, the intense burst of seismic activity lasting several days has been described as unusual.

"They're certainly not normal," said Robert Smith, a professor of geophysics at the University of Utah. "We haven't had earthquakes of this energy or extent in many years."

"This is an active volcanic and tectonic area, and these are the kinds of things we have to pay attention to," he said. "We might be seeing something precursory.

"Could it develop into a bigger fault or something related to hydrothermal activity? We don't know. That's what we're there to do, to monitor it for public safety."

Yellowstone is situated on a giant, geologically active feature known as a supervolcano and boasts some 75 per cent of the world's geysers. Much of the park sits in a caldera, or crater, which was formed when the massive volcano erupted 70,000 years ago.