FINDING FAULT: Japan's nuclear watchdog backed the conclusion of a panel of experts that found a seismic fault running underneath one of two reactors at an atomic plant in western Japan is active, making the reactor's restart virtually impossible.
NO NUKES: Japanese regulations prohibit reactors from sitting above active faults. Tsuruga's No. 2 reactor now faces indefinite stoppage or likely decommissioning unless its operator provides new data overriding the watchdog's decision.
RING OF FIRE: It was the first time regulators had officially recognized an active fault underneath an existing reactor, virtually acknowledging that the risk had been overlooked for decades by both the operator and regulators. The watchdog is now investigating five other plants around the country over suspected active faults there.