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, digital data of the observation records in this report have 
provided to the Japan Association for Earthquake Engineering free of charge 
for the purpose of further academic development in the fields of seismology, 
earthquake engineering and seismic engineering.

Up to now, since the 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 been prepared, we provide these digital data to the Japan Association 
for Earthquake Engineering free of charge, and disclose them. 

Attachment: The Observed Seismic Data of the Tohoku-Taiheiyou-Oki 
            Earthquake Collected at the Main Anti-earthquake Buildings 
            of Fukushima Daiichi and Daini NPS and at the ground surface 
            in the site of Fukushima Daiichi NPS (PDF 68.5KB)