The data of Tohoku-Chihou-Taiheiyo-Oki Earthquake observed by seismometers
located R/B, T/B, and underground in the site of Fukushima Daiichi and
Daini Nuclear Power Stations, which are installed to evaluate important
facilities for seismic safety, were reported to NISA on May 16, 2011.
(Announced on May 16, 2011)
In addition, the overall observation records of Tohoku-Chihou-Taiheiyo-Oki
Earthquake at the Main Anti-earthquake Buildings of Fukushima Daiichi and
Daini NPS and at the ground surface in the site of Fukushima Daiichi NPS
have also been announced.
(Announced on September 29, 2011)
Since then, observation record after the main quake of Tohoku-Chihou-
Taiheiyo-Oki Earthquake, recorded at seismograph within Fukushima Daiichi
NPS site, has been checked. We have compiled a report of the analysis of
records around the possible time of explosion at each unit.
Attachment: Analysis result of Fukushima Daiichi NPS reactor building
explosion (PDF 163KB)