instrument that records seismic waves by measuring ground motions, caused by earthquakes, volcanic eruptions, and explosions
A seismometer or seismograph is an instrument that measures motions of the ground, including those generated by earthquakes, nuclear explosions and other sources.
Records of seismic waves called seismograms allow us to map the interior of the Earth, and to find and measure the size of those different sources.
The word derives from the Greek word, seismós, a shaking or quake, from the verb σείω, seíō, to shake; and μέτρον, métron, measure.
The technique of using a seismometer to build up a picture of the Earth's interior is called seismic tomography.
- ↑ Richter, C.F. (1958). Elementary Seismology. San Francisco: W.H. Freeman.
- ↑ Nolet, Guust (ed) 1987. Seismic tomography: seismology and exploration geophysics. Springer Netherlands. ISBN 9789027725837
- The history of early seismometers Archived 2003-04-15 at the Wayback Machine
- A Java code applet demonstrating the operation of a damped-mass seismometer
- Keeping track Archived 2009-02-01 at the Wayback Machine