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17 April 2014 12:48 pm ,
Vol. 344 ,
Three years ago, Jennifer Francis of Rutgers University proposed that a warming Arctic was altering the behavior of the...
Officials last week revealed that the U.S. contribution to ITER could cost $3.9 billion by 2034—roughly four times the...
An experimental hepatitis B drug that looked safe in animal trials tragically killed five of 15 patients in 1993. Now,...
Using the two high-quality genomes that exist for Neandertals and Denisovans, researchers find clues to gene activity...
A new report from the Intergovernmental Panel on Climate Change (IPCC) concludes that humanity has done little to slow...
Astronomers have discovered an Earth-sized planet in the habitable zone of a red dwarf—a star cooler than the sun—500...
- 17 April 2014 12:48 pm , Vol. 344 , #6181
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ScienceShot: North America's Largest Modern Landslides?
6 January 2014 4:45 pm
Two massive landslides that occurred at Utah’s Bingham Canyon copper mine last 10 April moved about 65 million cubic meters of earth, enough to bury New York City’s Central Park 20 meters deep. That figure makes them the largest nonvolcanic slides known in North America in centuries—although the landslide that triggered the 1980 eruption of Mount St. Helens in Washington state was about 57 times as voluminous. Coming 95 minutes apart, the two slumps raced down the 970-meter-tall northern wall of the open-pit mine at speeds topping 160 kilometers per hour, researchers report in the January issue of GSA Today, a publication of the Geological Society of America. Nearby seismometers revealed that the events released energy equivalent to earthquakes of magnitudes 5.1 and 4.9 and triggered 16 tiny quakes over 10 days, the smallest of which packed less pop than a hand grenade. The team is now trying to identify the precise mechanism that triggered the aftershocks, which are the first ever to be recorded in the wake of a landslide.