About HOSHIBA Mitsuyuki
About Meteorological Res. Inst., Tsukuba, JPN
About IWAKIRI Kazuhiro
About Meteorological Res. Inst., Tsukuba, JPN
About Earth, Planets and Space
About large earthquake
About alarm system
About period(cycle)
About amplitude
About The 2011 off the Pacific coast of Tohoku Earthquake
About magnitude estimation
About urgent earthquake newsletter
About maximum amplitude
About oscillatory period
About Seismology in general
About 2011年東北地方太平洋沖地震
About 緊急地震速報
About 振幅