This activity could have a whole range of consequences. The scientists said they cannot immediately "identify any causative fault or other feature without further analysis." ( See a gallery of recent volcanic eruptions.) "This December 2008 earthquake sequence is the most intense in this area for some years," YVO reported, "and is centered on the east side of the Yellowstone Caldera," the ancient collapsed volcano beneath Yellowstone Lake. The activity relaxed in magnitude early this week but then flexed upward again to top 3.0 by early New Year's Eve. 27 most of the readings above 2.8 were felt by park employees and visitors around the lake area. 26 beneath Yellowstone Lake." The strongest tremor among the hundreds in the past week measured 3.9 on Dec. Last week, geologists at the Yellowstone Volcano Observatory (YVO) announced they had recorded a "notable swarm of earthquakes under way since Dec. with ash but also throw so much dust into the atmosphere that the world's climate could change.Ĭould the current activity be the warning signs of another such apocalypse? Or just a large but not world-ending earthquake, like the 7.5-magnitude temblor that happened on a summer night in 1959 and caused a mountain to slide down into a campground, killing 28 people and damming the Madison River? Helens in 1980 would not only cover most of the U.S. Today, such an explosion 1,000 times more powerful than the explosion of Mount St. But a wave of recent earthquake activity is raising fears that have their origins 642,000 years ago, when a Yellowstone "supervolcano" exploded so violently that it created the caldera itself. Indeed, Yellowstone National Park contains the floor of a gigantic volcanic cauldron, one that rises and sinks with the forces that lie beneath hence the picturesque geysers and steam holes. Follow who live along Montana's Yellowstone River are downstream from a simmering caldera, a geologic hot spot that has become especially active recently.
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