Horizontal-pendulum seismograph
Sismógrafo de péndulo horizontal
- Date
- 1880 · confidence high
- Place
- Imperial University, Tokyo, Japan
- Credited to
- John Milne, James Alfred Ewing and Thomas Gray
- People
- 👤 James Alfred Ewing1855–1935👤 John Milne1850–1913
- Field
- Knowledge & symbols
What it is
Seismographs that continuously recorded ground motion, developed by foreign professors in Tokyo after the 1880 Yokohama earthquake, when they founded the Seismological Society of Japan. They laid the foundations of instrumental seismology.
What it led to
- the Seismological Society of Japan (1880)
- Milne's worldwide seismological network
- Omori's law