seismograph
Earth movement detector
A seismograph is an instrument that detects and records vibrations in the earth, especially those caused by earthquakes.
The device produces a seismogram—a visual record of ground motion over time.
Seismographs measure intensity, duration, and direction of seismic waves, allowing scientists to locate earthquake epicenters and estimate magnitude.
Suspended swinging weight
- sensorInput-detecting device
- drumStruck percussion cylinder
- stylusPointed implement for marking
- needlePointed implement for sewing
trace · accelerometer · geophone · broadband · short-period · long-period · station · network
Smaller quake following larger
- magnitudeSize or scale
- RichterSeismological scale eponym
- shakingRapid involuntary movement
- faultImperfection or blame
rupture · mainshock · foreshock · quake · temblor · hypocenter · intensity · damage
Size or scale
- Richter scaleEarthquake strength measurement system
- intensityStrength or force level
- logarithmicBased on exponents
- amplitudeMaximum oscillation displacement
period · frequency · data · analysis · quantification · scale · units · sensitivity
Longitudinal seismic wave
- S-waveTransverse seismic vibration
- surface waveOscillation at medium boundary
- amplitudeMaximum oscillation displacement
- frequencyRate of recurrence
arrival · onset · phase · wiggle · signal · noise · baseline · deflection
Study of crustal deformation
- plate boundaryWhere Earth's sections meet
- subductionPlate descending beneath another
- fault lineTectonic boundary crack
- riftCrack or estrangement
crust · mantle · lithosphere · volcano · geophysics · subsurface · bedrock · slip
pendulum
Suspended swinging weight
needle · trace · accelerometer · geophone · broadband · short-period · long-period · station · network · array
aftershock
Smaller quake following larger
fault · rupture · mainshock · foreshock · quake · temblor · hypocenter · intensity · damage · alert
magnitude
Size or scale
- Richter scaleEarthquake strength measurement system
- intensityStrength or force level
- logarithmicBased on exponents
amplitude · period · frequency · data · analysis · quantification · scale · units · sensitivity · precision
P-wave
Longitudinal seismic wave
- S-waveTransverse seismic vibration
- surface waveOscillation at medium boundary
- amplitudeMaximum oscillation displacement
frequency · arrival · onset · phase · wiggle · signal · noise · baseline · deflection · oscillation
tectonics
Study of crustal deformation
- plate boundaryWhere Earth's sections meet
- subductionPlate descending beneath another
- fault lineTectonic boundary crack
rift · crust · mantle · lithosphere · volcano · geophysics · subsurface · bedrock · slip · stress
- earth scienceatmosphere, earthquake, geology, volcano, crust
- earthquakesearthquake, quake, earthquakes, quakes, magnitude
- East Asian Culturechopsticks, yin and yang, tea ceremony, origami, qi
- British Inventionssteam engine, jet engine, spinning jenny, power loom, telephone
- oil industrypetroleum, oil fields, oil well, oil rig, oil production
- seismologyearthquake, earthquakes, fault zones, hypocenter, magnitude
seismographbarometer
Instrument gauging atmospheric pressure
thermometer · anemometer · hygrometer · rain gauge · weather station