TEPCO : Press Release | Observed Seismic Data Collected at Fukushima Daiichi Nuclear Power Stations pertaining to the Tohoku-Taiheiyou-Oki Earthquake (Continued report)

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Press Release (Oct 21,2011)
Observed Seismic Data Collected at Fukushima Daiichi Nuclear Power Stations pertaining to the Tohoku-Taiheiyou-Oki Earthquake (Continued report)

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)