According to the Japan Nuclear Regulation Authority, Fukushima was reassessed a year prior to the tsunami. It was determined that the plant needed to be retrofitted to withstand a much stronger earthquake. Had the plant been offline or retrofitted, the accident may have been far less severe.It is already known that Diablo Canyon, operated by Pacific Gas and Electric Co. in San Luis Obispo County, may be subjected to 30 percent more ground shaking from nearby faults than Fukushima experienced. The first of several ongoing studies, published last week, states ground shaking at Diablo Canyon can exceed plant design. It is anticipated this will lead to years of more study. The Nuclear Regulatory Commission will then consider ordering upgrades. Continue reading
Three fault segments running beneath Northern California and its roughly 15 million people are overdue for a major earthquake, including one that lies northeast of San Francisco and near the dams and canals that supply much of the state’s water, according to a geological study published Monday.
The three segments and one other in Northern California are loaded with enough tension to produce quakes of magnitude 6.8 or greater, according to a geological study published Monday, according to a geological study published Monday. Continue reading