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Hello Summer!
- Joined
- Nov 1, 2005
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Well, this would certainly top off the dominos of disaster (economic or otherwise) that have been tumbling one after another across the U.S over the last few months.....
Rest of the article here. Now if you'll all excuse me, I'm going to move...oh, I dunno, maybe to Australia. That might be safe enough....a wave of recent earthquake activity [in Yellowstone] is raising fears that have their origins 642,000 years ago, when a Yellowstone "supervolcano" exploded so violently that it created the caldera itself. Today, such an explosion - 1,000 times more powerful than the explosion of Mount St. Helens in 1980 - would not only cover most of the U.S. with ash but also throw so much dust into the atmosphere that the world's climate could change.
Could 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?
Last week, geologists at the Yellowstone Volcano Observatory (YVO) announced they had recorded a "notable swarm of earthquakes under way since Dec. 26 beneath Yellowstone Lake." The strongest tremor among the hundreds in the past week measured 3.9 on Dec. 27; most of the readings above 2.8 were felt by park employees and visitors around the lake area. The activity relaxed in magnitude early this week but then flexed upward again to top 3.0 by early New Year's Eve. "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 scientists said they cannot immediately "identify any causative fault or other feature without further analysis."
This activity could have a whole range of consequences. In a study released last year, the United States Geological Survey (USGS) said possible hazards could include hydrothermal explosions, when steam breaks through the surface and forms a crater. That has happened 26 times in the park's 127 years of record-keeping. The USGS discounted chances for cataclysmic eruption of the caldera, noting that the hot, active magma chamber below Yellowstone has turned into "largely crystallized mush." But the same study also said: "Depending on the nature and magnitude of a particular hazardous event and the particular time and season when it might occur, 70,000 to more than 100,000 persons could be affected; the most violent events could affect a broader region or even continent-wide areas."