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Earth

Eastern US Earthquake shook North Anna nuclear plant in Virginia more than it was designed to handle

Last month’s record earthquake in the eastern United States may have shaken a Virginia nuclear plant twice as hard as it was designed to withstand, a spokesman for the U.S. nuclear safety regulator said on Thursday. But Dominion Resources told the Nuclear Regulatory Commission that the ground under the plant exceeded its “design basis” only by about 10 to 20 percent, and it plans to prove in the next month that its reactors are safe to restart. The discrepancy is one of many items the NRC and company must deal with, in the first instance in which an operating U.S. nuclear power plant has experienced a quake beyond its design parameters. The NRC must sign off on Dominion’s restart plans for the North Anna plant, about 12 miles from the quake’s epicenter — and determine how it will make that decision.

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Crab Invasion from Antarctica?

King crabs and other crushing predators are thought to have been absent from cold Antarctic shelf waters for millions of years. Scientists speculate that the long absence of crushing predators has allowed the evolution of a unique Antarctic seafloor fauna with little resistance to predatory crabs. A recent study by researchers from the University of Hawaii at Mānoa, Duke University, Ghent University, Lamont-Doherty Earth Observatory, and Hamilton College, indicates that one species of king crab has moved 120 km across the continental shelf in West Antarctica and established a large, reproductive population in the Palmer Deep along the west Antarctic Peninsula.

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Crab Invasion from Antarctica?

King crabs and other crushing predators are thought to have been absent from cold Antarctic shelf waters for millions of years. Scientists speculate that the long absence of crushing predators has allowed the evolution of a unique Antarctic seafloor fauna with little resistance to predatory crabs. A recent study by researchers from the University of Hawaii at Mānoa, Duke University, Ghent University, Lamont-Doherty Earth Observatory, and Hamilton College, indicates that one species of king crab has moved 120 km across the continental shelf in West Antarctica and established a large, reproductive population in the Palmer Deep along the west Antarctic Peninsula.