Hydrogen explosion may have happened at reactor 4 and been concealed by the government ,said on the blog of Katayama Satsuki, a member of the House of Councilors of Liberal Democratic Party.
On the post of 1/13/2012 of her blog, she wrote like this below,
さきほど、南相馬の元市議会議員から市長に連絡がはいり、1月9日にまた、福島第一で(おそらく4号炉だと思うが)なんらかの爆発が起きており、それを政府が隠している、という話であった。真偽のほどはわからないが、水素爆発ではあっても、核爆発ではないであろう。(水素爆発でも、放射能の飛散がかなりの量でおきるのになぜそれほど平静なのか、地獄を見た方は違う、と、原発50キロ以内におられる方の背負ってきた凄まじい恐怖とストレスを、かえって痛感させられました。)
<Translation>
Now I heard that the city mayor of Minamisoma got the phone call from a former city councilor to tell, on 1/9/2012, at Fukushima plant, (Probably at reactor 4) some kind of explosion happened, and the government is concealing it.
I’m not quite sure if it’s true or not, but it probably is not a nuclear explosion but a hydrogen explosion. (Even by a hydrogen explosion, radiation is scattered in a huge scale. I wondered why the person can stay that cool in such a situation. Probably he has already seen hell, he might be used to dealing with the fear and the stress by living in the 50km area.)
<End>
On 1/10/2012, this blog posted about the unusual amount of helicopter observed in Kanto area.
(Source)
Iori Mochizuki