Seismograph | Definition & Facts | Britannica
seismograph, instrument that makes a record of seismic waves caused by an earthquake, explosion, or other Earth -shaking phenomenon. Seismographs are equipped with electromagnetic sensors that translate ground motions into electrical changes, which are processed and recorded by the instruments’ analog or digital circuits.
Seismometers, seismographs, seismograms - what's the …
A seismogram is the recording of the ground shaking at the specific location of the instrument. On a seismogram, the HORIZONTAL axis = time (measured in seconds) and the VERTICAL axis= ground displacement (usually measured in millimeters).
Seismographs - Keeping Track of Earthquakes | U.S. Geological …
Seismic waves lose much of their energy in traveling over great distances. But sensitive detectors (seismometers) can record theses waves emitted by even the smallest earthquakes. When these detectors are connected to a system that produces a permanent recording, they are …
Seismometer - Wikipedia
A seismometer is an instrument that responds to ground displacement and shaking such as caused by quakes, volcanic eruptions, and explosions. They are usually combined with a timing device and a recording device to form a seismograph. [1] .
Seismography Definition & Meaning - Merriam-Webster
The meaning of SEISMOGRAPH is an apparatus to measure and record vibrations within the earth and of the ground.
What is a seismograph and how does it work? | SAGE - IRIS
A seismograph is a device for measuring the movement of the earth, and consists of a ground-motion detection sensor, called a seismometer, coupled with a recording system. A simple seismometer that is sensitive to up-down motions of the earth can be understood by visualizing a weight hanging on a spring.
Real-time Seismogram Displays - USGS Earthquake Hazards …
These seismogram displays depict ground motion recorded by seismograph stations in real-time, updated every few minutes. Each plot represents 24 hours of data from one station. Read more ».
Earthquake Detection, Recording, Analysis - Britannica
In general, then, the seismograph is an instrument in which the relative motion of pendulum and ground is recorded. It is equally possible to take the ratio between the deflection of the pendulum and the velocity (or acceleration) of the ground. That ratio is called the velocity (or acceleration) sensitivity of the seismograph.
Earthquake Detection, Monitoring, & Analysis - Britannica
A seismograph records oscillation of the ground caused by seismic waves that travel from their point of origin through Earth or along its surface.
How Does a Seismograph Work? - HowStuffWorks
2023年8月30日 · A seismograph is a recording device that scientists use to measure earthquakes. The goal of a seismograph is to accurately record seismic waves during a quake. If you live in a city, you may have noticed the ground shaking when a …