This is the latest update from the IAEA. More to this update and previous updates at link:
Japanese Earthquake Update (15 March 11:25 UTC)
Fukushima Daiichi Nuclear Power Plant Update
Radiation Dose Rates Observed at the Site
The Japanese authorities have informed the IAEA that the following radiation dose rates have been observed on site at the main gate of the Fukushima Daiichi Nuclear Power Plant.
At 00:00 UTC on 15 March a dose rate of 11.9 millisieverts (mSv) per hour was observed. Six hours later, at 06:00 UTC on 15 March a dose rate of 0.6 millisieverts (mSv) per hour was observed.
These observations indicate that the level of radioactivity has been decreasing at the site.
http://www.iaea.org/newscenter/news/tsunamiupdate01.html
Japanese Earthquake Update (15 March 11:25 UTC)
Fukushima Daiichi Nuclear Power Plant Update
Radiation Dose Rates Observed at the Site
The Japanese authorities have informed the IAEA that the following radiation dose rates have been observed on site at the main gate of the Fukushima Daiichi Nuclear Power Plant.
At 00:00 UTC on 15 March a dose rate of 11.9 millisieverts (mSv) per hour was observed. Six hours later, at 06:00 UTC on 15 March a dose rate of 0.6 millisieverts (mSv) per hour was observed.
These observations indicate that the level of radioactivity has been decreasing at the site.
http://www.iaea.org/newscenter/news/tsunamiupdate01.html