Federal regulators say last week’s East Coast earthquake caused the shift of massive casks storing nuclear fuel at Virginia’s North Anna nuclear power facility. According to the Nuclear Regulatory Commission, the 5.8-magnitude earthquake moved the casks an inch to four inches on their concrete pad. It is the first time a U.S. earthquake has ever caused such a shift of nuclear casks in the United States. The plant’s operator says the casks sustained no damage and are not a threat. The news comes as a government review has found the risk of an earthquake triggering a major accident at U.S. nuclear plants is far greater than previously thought. According to the Associated Press, a Nuclear Regulatory Commission analysis says the North Anna plant is 38 percent more likely to suffer core damage from an earthquake than it was 20 years ago.