Seismometer

Seismometer (in Greek seismos = earthquake and metero = measure) are used by seismologists to measure and record seismic waves. By studying seismic waves, geologists can map the interior of the Earth, and measure and locate earthquakes and other ground motions. The term seismograph is usually interchangeable, but seismometer seems to be a more common useage.

External Links

• Erhard Wielandt's 'Seismic Sensors and their Calibration'- Current (2002) reference by a widely-consulted expert.
• The history of early seismometers
• A Java code applet demonstrating the operation of a damped-mass seismometer
• http://neic.usgs.gov/neis/seismology/keeping_track.html
• Zero Length Springs in Seismographs
• Link to live Seismic Drum at Geonet's Mangatainoka River station in New Zealand
• Public seismograph network- many resources for amateurs and underfunded institutions
• A USGS standard seismometer designed by a seismic instrumentation engineer for home construction and use.
• The Lehman amateur seismograph, from Scientific American- not designed for calibration.
• USGS evaluation of Streckheisen STS-2 Seismometer models- Streckheisen is a common make of research seismometers