On par with the radiation near Koriyama JR Station in Koriyama City in Fukushima (80 to 120 microsieverts/hr spot, see my post from yesterday).
Setagaya-ku is where the tubes of radium were found to have been emitting strong radiation. The radiation level was 4.7 microsieverts/hr.
The Ministry of Education and Science, again very quick to act, suspects something radioactive is buried on the spots. There are two spots, one is emitting 110 microsieverts/hour radiation on the sidewalk, the other 30 to 40 microsieverts/hour at the supermarket entrance. They are both paved with asphalt.
The photograph is from Sankei Shinbun, of the 110 microsieverts/hour spot on the sidewalk. As you can see, it's just an ordinary stretch of a sidewalk.
From Sankei Shinbun (10/29/2011):
Setagaya-ku, Tokyo announced on October 28 that maximum 110 microsieverts/hour radiation was detected in the supermarket compound and on the sidewalk surface near the supermarket in Hachiman-yama in Setagaya-ku. The Ministry of Education and Science doesn't think the high radiation is caused by radioactive materials from the Fukushima I Nuclear Power Plant accident, judging from the situation on the scenes.
According to Setagaya-ku, 110 microsieverts/hour radiation was detected near the sidewalk shrub on the backside of a supermarket. It was 4.7 microsieverts/hour at 1 meter from the ground. 30 to 40 microsieverts/hour radiation was detected from the surface of the ground in the supermarket compound near the main entrance.
On October 28 afternoon, a resident informed the Setagaya government that high radiation was detected, and the Ministry of Education and Science went to measure. The supermarket told Setagaya-ku that it had no idea why the radiation was so high.
Setagaya-ku piled sandbags at these 2 locations so that people would not go near.
According to the Ministry of Education and Science, both locations are paved with asphalt, and there were no side drains or soil sediments nearby where radioactive materials were likely to accumulate. Therefore, the Ministry has concluded that it is likely that certain radioactive materials are buried there.
In Setagaya-ku, high radiation was measured on the road in front of a private home on October 12. Later, bottles with radium were found from under the floor of the home.
Two locations, paved with asphalt, nowhere near the drain or pile of dirt. What could that be this time?