1. Disaster Countermeasures Office (2011a) About the 2011 Great East Japan Earthquake and Tsunami,
http://www.kantei.go.jp/saigai/pdf/201104271700jisin.pdf
(in Japanese)
2. Disaster Countermeasures Office (2011b) About the accident of Fukushima Nuclear Power Plants No.1 and 2 in 2011, 166p (in Japanese).
3. Earthquake Research Institute, The University of Tokyo (2011) Velocity profile and response stpectrum,
http://outreach.eri.u-tokyo.ac.jp/eqvolc/201103_tohoku/#lngprd
(in Japanese)
4. Geographical Survey Institute (2011) About crustal movement in March, 2011,
http://www.gsi.go.jp/WNEW/PRESS-RELEASE/2011-goudou0408.htm
(in Japanese)
5. Headquarters for Earthquake Research Promotion (2011): Evaluation of the 2011 off the Pacific Coast of Tohoku Earthquake,
http://www.jishin.go.jp/main/chousa/11mar_sanriku-oki2/index.htm
(in Japanese)