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24 April 2014 11:45 am ,
Vol. 344 ,
Major climate data sets have underestimated the rate of global warming in the last 15 years owing largely to poor data...
The tsetse fly is best known as the vector for the trypanosome parasites that cause sleeping sickness and a disease in...
The National Institutes of Health is revising its "two strikes" rule, which allowed researchers only one chance to...
By stabilizing the components of retromers, molecular complexes that act like recycling bins in cells, a recently...
Fossil fuels power modern society by generating heat, but much of that heat is wasted. Semiconductor devices called...
Researchers are gaining insights into what made Supertyphoon Haiyan so powerful and devastating through post-storm...
Millions around the world got a first-hand look at what it was like to be in Tacloban while it was pummeled by...
- 24 April 2014 11:45 am , Vol. 344 , #6182
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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.