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Keywords: Seismometer wave pattern of the Great Kantō earthquake at Hongo.jpg 関 大 の 計の 西方向の波形 は振り切れてしまっている Great Kantō earthquake 1923年<br/> upload date 2014-10-06 20 45 58 科学知識・ 災号 科学知識普及会(1923年刊) 今 明恒 Akitsune Imamura other versions Custom license marker 2014 10 06 PD-Japan-oldphoto Uploaded with UploadWizard 1923 Great Kantō earthquake Akitsune Imamura |