Following today’s M8.9 earthquake in Japan, three of four of nuclear reactors in the affected region have been shut down safely. A fourth reactor which was automatically shut down after the earthquake has encountered some issues its cooling system due to loss of electrical power and a state of emergency has been issued, although currently no reports of radiation leakage has been reported.
For more information, please see the article Japan Issues Emergency at Nuclear Plant at the Wall Street Journal.
More information in English is available from the News Centre at the International Atomic Energy Agency in Vienna, Austria. The IAEA is in communication with Japanese Ministry of Economy, Trade and Industry (METI) regarding the status of the reactors.
— J. E. Clark | 11 March 2011