Following up this article..Black substance emits 45.699μSv/h of alpha ray
The black substance, which is probably Cyanophyceae, was mass generated after the rain.
As it goes warmer and more humid, it may come out more.
HCR reported.
【南相馬黒い粉】数日の降雪降雨の後に大量のまるで土砂のような黒い悪魔が市内の幹線道路に大量発生した。即座に市の除染対策室に通報するも中間貯蔵施設が無いため除染は無理と回答。まずやることは校舎内と通学路の除染。50μSv/hオーダーを計測。 twitter.com/HCR_OPCOM/stat…
— Bansho (@HCR_OPCOM) March 7, 2012
<Translate>
[The black substance of Minami soma] After the snow and rain of several days, massive amount of the devilish black substance was mass generated on the arterial road of Minami soma. It looks as if it was earth and sand. called the decontamination office of the city government promptly, but they declined to say the interim storage facility is full. First of all, we shall decontaminate the school facility and road. We measured 50μSv/h.
<End>
Iori Mochizuki