John Milne (1850-1913) was a professor of mining and geology at the Imperial College of Engineering, Tokyo. While living in Japan, Milne became very interested in seismology, prompted by a strong seismic shock he experienced in Tokyo in 1880. Sixteen years later Milne and two colleagues completed work on the first seismograph capable of recording major earthquakes. This book, originally published in London in 1886, explains why earthquakes happen...