Following up this article..Increasing black substance in Tokyo
Highly radioactive black substance was found in Mizumoto park of Katsushika ku Tokyo too.
A Tokyo citizen reported like this below,
4.3μSv/h 水元公園(東金町運動場寄り)トイレ脇。 #jp_geiger #gctjp #tkgginstagr.am/p/I22_qAzQgj/
— Sonntag-Fujikawa (@sonntag_F) April 1, 2012
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Beside the toilet near Higashikanemachi play ground, it was 4.3μSv/h.
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雨樋がない故。 #tkgginstagr.am/p/I23Kq4TQgr/
— Sonntag-Fujikawa (@sonntag_F) April 1, 2012
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Because there is no roof gutter.
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土で詰まった排水口-1。1.5μSv/h。水元公園・修景池周囲。 #tkgg #jp_geiger #gctjpinstagr.am/p/I4BmK2TQgT/
— Sonntag-Fujikawa (@sonntag_F) April 1, 2012
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1.5μSv/h at drain outlet stuck with soil.
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Mr. Oyama, Minamisoma city councilor had the black substance analyzed Prof. Suzuki from Tohoku university.
It is cyanobacteria, blown out when it’s dry and also produces spores to fly around.
Iori Mochizuki