Dates when there is no earthquake which can be felt in Japan since March 9th, 2011.
  • Feb. 4, 2017.
  • Jan. 25, 2017.
  • Mar. 27, 2016.
  • Feb. 13, 2016.
  • Oct. 14, 2015.
  • June 12, 2015.
  • May 9, 2015.
  • Apr. 17, 2015.
  • Feb. 16, 2015.
  • June 23, 2014.
  • June 05, 2014.
  • Jan. 27, 2014.
  • June 18, 2013.

    Longrun data since Jan. 2014, 9 months after since Nw = 9 earthquakes.
  • Long-time data, updated on May 28th, 2013.

    Five years have passed since Huge earthquake disaster Mw=9.0 happened on March 11th, 2011, in Japan, next month.

    1,000 days have passed since Huge earthquake disaster Mw=9.0 happened on March 11th, 2011, in Japan.


    Four years passed. Heavy and Huge series of earthquakes' disaster occurred at very large area of the eastern half of Japan since March 9th, 2011.

    Maximum magnitude and seismic intensity are 9.0 and 7 at 14:46 on March 11th.

    Many people over 10,000 are dead. Numorous people are injured, and have been still standing at severe environmnets related to the radition- and the electricity problems.

  • My study place was damaged and important materials had been broken, but my base experiment area has been already restored. The seismic intensity was 6w.
  • My individual study has been continued with a slight two-weeks break.
  • My family and related persons are all alive, although having heavy problems.

  • Victims identified until Dec. 8, 2016.
  • ----------------------------------------
  • Pref. Dead (Missing)
  • ----------------------------------------
  • Miyagi 9,540
  • Iwate 4,673
  • Fukushima 1,613
  • Ibaraki 24
  • Chiba 21
  • Tokyo 7
  • Kanagawa 4
  • Tochigi 4
  • Aomori 3
  • Yamagata 2
  • Hokkaidoh 1
  • Gunma 1
  • Total 15,893 (2,556)
  • -----------------------------------------------------
  • --- * I pray thier souls may rest in peace. ---
  • -----------------------------------------------------

    Rough radiation measurement:
  • --- 0.21 at KEK Tsukuba, 0.25 at Yatabe, 0.1 (uSv/h) at W-Tokyo on Mar. 29, 2011.
  • --- KEK Tsukuba monitoring : the unit is [uSv/h].
  • ***** It is reducing smoothly less than 0.12 [uSv/h] after.
  • ***** 0408: 0.13 (smooth decay)
  • ***** 0407: 0.13 (smooth decay)
  • ***** 0406: 0.13 (smooth decay)
  • ***** 0405: 0.13 (smooth decay)
  • ***** 0404: 0.14 (smooth decay)
  • ***** 0403: 0.15 (smooth decay)
  • ***** 0402: 0.16 (smooth decay)
  • ***** 0401: 0.17 (smooth decay)
  • ***** 0331: 0.18 (smooth decay)
  • ***** 0330: 0.19 (smooth decay)
  • ***** 0329: 0.20 (smooth decay)
  • ***** 0328: 0.21 (smooth decay)
  • ***** 0327: 0.21 (smooth decay)
  • ***** 0326: 0.22 (smooth decay)
  • ***** 0325: 0.23 (smooth decay)
  • ***** 0324: 0.25 (smooth decay)
  • ***** 0323: 0.27 (smooth decay)
  • ***** 0322: 0.27
  • ***** 0321: 0.24 (slowly increment with Max. 0.34)
  • ***** 0320: 0.17 (Max. 0.26 peak and smooth decay)
  • ***** 0319: 0.17 (smooth decay)
  • ***** 0318: 0.18 (smooth decay)
  • ***** 0317: 0.19 (smooth decay)
  • ***** 0316: 0.21 (Max. 0.66 pulse peak)

    Offical web site of real-time monitoring of radiation at KEK Tsukuba.

    --- Averaged environment radioactivity 1.2 (mSv/y) is equivalent to 0.14 (uSv/h).


  • To a personal site of Eiji Nakamura.
  • *** Level- A : Representative published papers.
  • *** Level-B : References.
  • *** Level-C : PADN (Particle Accelerator Development Notes).
  • *** KAKENHI 21540310.
  • *** KAKENHI 25286089.
  • *** KAKENHI 26610074.
  • *** Technical Committee of JSPF.
  • To KEK-PS Kicker Group site.
  • To the KEK-PS site.
  • To 500MeV p-AR Site
  • To KEK-PS-MR EP1 Radiation
  • Trip Report to CERN-PS Septum Group.
  • To the ERL site.
  • To the KEK official site.
  • Old Version URL
  • Personal Information ---