A new, joint U.S. – Japan aerial survey shows levels of surface radiation around the Fukushima nuclear power plant. As expected the map shows a band of fall-out north west of the site, but it also reveals high levels of radioactive substances (in red) outside the mandatory 20km exclusion zone.
From Japanese news website Asahi:
After the 1986 Chernobyl disaster, those living in areas with more than 555,000 becquerels of cesium-137 per square meter were forced to relocate. However, the latest map shows that accumulated radioactivity exceeded this level at some locations outside the official evacuation zones, including the village of Iitate and the town of Namie.
According to Japan Probe, villagers in Iitate are now in the process of being evacuated.
The U.S. Department of Energy has published this (Flash) slideshare presentation. Details of the new survey start on page 4.