TL;DRAbstract
Although Poisson worked out the theory of transmission of elastic waves in solids in 1831, the relation of this theory to seismic waves was not realized for a long time. This is not surprising considering that the first practical seismograph was not invented by Cecchi until 1875 and that John Milne began recording earthquakes only in 1880. In 1847, William Hopkins pointed out that earthquakes must consist of elastic waves. Robert Mallet (1852, 1861) accepted this idea and even tried to measure their velocity of transmission. His instrumentation, however, was inadequate, and he obtained velocities that were much too low to be other than some phase of what we now know to be surface waves.
Chat with Paper
AI Agents for this Paper
Although Poisson worked out the theory of transmission of elastic waves in solids in 1831, the relation of this theory to seismic waves was not realized for a long time. This is not surprising considering that the first practical seismograph was not invented by Cecchi until 1875 and that John Milne began recording earthquakes only in 1880. In 1847, William Hopkins pointed out that earthquakes must consist of elastic waves. Robert Mallet (1852, 1861) accepted this idea and even tried to measure their velocity of transmission. His instrumentation, however, was inadequate, and he obtained velocities that were much too low to be other than some phase of what we now know to be surface waves.
Keywords
Chat
Click to start Chat