About HARA Tatsuhiko
About International Inst. Seismology and Earthquake Engineering, Ibaraki, JPN
About Earth, Planets and Space
About shallow earthquake
About radiation
About 高周波エネルギー放射
About Physical properties of earthquake
About 高バンド
About パス
About フィルター
About 大規模
About 震源
About 遠地地震
About P波