Summary of survey

MEXT conducted emergency sea area monitoring around Fukushima Dai-ichi NPP from March 23, 2011 to investigate the distribution of radioactive substances released by the Fukushima Dai-ichi NPP accident following the great east Japan earthquake. Based on "Enhancement of Sea Area Monitoring (April 22, 2011, Headquarters against Nuclear Disasters)", marine soil samples from sea bed to 3 cm depth were collected at sampling points offshore of Fukushima Prefecture, Miyagi Prefecture and Ibaraki Prefecture. The data here was created based on the measurement results of dust monitoring.
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