By By Kev Hedges Mar 15, 2011 in Environment Fukushima - The Japanese government announced radiation levels have just started to fall around the stricken Fukushima Daiichi nuclear plant. Updated This is the first time radiation levels at the site have reportedly fallen since the containment system was The government announcement was made after they had extinguished a fire and had earlier reported radiation levels had reached harmful levels. In Digital Journal earlier, it was reported everyone within 20 km of the plant has been told to leave that area. That exclusion zone still remains but the radiation readings going down will be a welcome piece of news for the beleaguered rescue teams.Updated weather reports now show winds are blowing the radiation out in an easterly direction towards the Pacific Ocean. There is still a no-fly zone of 30km around the plant, this is to prevent aircraft from spreading radiation it may pick up in the atmosphere. However rescue efforts in the country are still being hampered by ongoing aftershocks. Today saw a 6.1-magnitude just south-west of Tokyo, reports BBC News.This is the first time radiation levels at the site have reportedly fallen since the containment system was breached around one of the reactors on yesterday. A build up of hydrogen following over-heating has been causing the explosions in the reactors. More about Fukushima Daiichi, japan earthquake, Radiation More news from Fukushima Daiichi japan earthquake Radiation