Seismograph trace of the Tokyo earthquake, 1923.
© Science Museum / Science & Society Picture Library
A Milne-Shaw seismogram, recorded at Oxford, of the earthquake which struck Tokyo and Yokohama on 1st September 1923. The earthquake, measuring 7.9 on the Richter Scale, caused masive devastation acros south-eastern Japan, particularly in the densely populated cities of Tokyo and Yokohama. The earthquake itself and the fires caused by it claimed an estimated 140,000 lives.