I don’t see those numbers to be alarming. According to http://japanoutdooradventures.com/post/4126799166 the natural background radiation is approximately 0.27 μSv/h in Japan, far higher than the data seen on here. My Geiger counter reads 0.09 μSv/h right now outside here in Chiba, next to Tsudanuma station.
I don’t see those numbers to be alarming. According to http://japanoutdooradventures.com/post/4126799166 the natural background radiation is approximately 0.27 μSv/h in Japan, far higher than the data seen on here. My Geiger counter reads 0.09 μSv/h right now outside here in Chiba, next to Tsudanuma station.