7.1 earthquake: The new tremor late Thursday threw even more areas into disarray and sent communities that had made some gains back to square one.
Workers plugged a leak of highly radioactive water into the ocean from Japan's Fukushima Daiichi nuclear power plant Wednesday, even as they tried to prevent another hydrogen explosion in reactor No. 1 by injecting nitrogen gas.
Plutonium has been found in low quantities in the soil around the stricken Fukushima nuclear power plant as public dissatisfaction with officials continues to percolate.
The contaminated pools in the reactor turbine buildings have created a tough new challenge for officials trying to contain the Japan nuclear crisis. The source of radioactivity is a mystery.
Levels of radioactive iodine reached 1,250 times above normal in seawater off the coast of Japan's stricken Fukushima Daiichi nuclear plant, raising concerns about a containment crack.
The power to operate cooling pumps, a challenge at the heart of the Japan nuclear crisis, is on the verge of being restored, and a detailed assessment by a US expert is notably upbeat.