Monitoring data at Ibaraki prefecture [13; 00 May 21, 2011]
4-3-2-4 Radiation survey of environment
Reading of environmental radioactivity level by prefecture [13; 00 May 21, 2011]
Reading of environmental radioactivity level by prefecture [19; 00 May 21, 2011]
Reading of the radiation rate with the cooperation of universities [May 21, 2011]
Detection of radioactive materials from seawater near Fukushima Daiichi Nuclear Power Station (74th release)
Radioactivity density of seawater (Appendix)
Radioactivity density of seawater (Attachment)