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Aug 14, 2024 · 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.
- Strain Seismograph
Other articles where strain seismograph is discussed:...
- Press-Ewing Seismograph
Other articles where Press-Ewing seismograph is discussed:...
- Horizontal pendulum seismograph, as invented by English seismologist John Milne in 1880. A boom (B), to which the mass (M) was attached, was suspended horizontally by a pivot (P) and a silk thread (T) fixed to a point above the pivot. A thin plate (C), in which a narrow slit was cut parallel to the boom, was attached to the end of the boom. A similar plate with a slit at right angles to the upper ...
- The Press-Ewing seismograph, developed in the United States for recording long-period waves, was widely used throughout the world.
- Schematic diagram of a strain seismograph. A and B are two piers separated by a distance, which may be 20 metres (65 feet) or more. One end of a rod (R) is fixed to pier B and the other placed near pier A. Earth strains resulting from seismic waves produce variations in the separation of the two piers. Those variations are observable as changes in the distance between the free end of the rod and p...
- Developing a worldwide seismic warning network that uses smartphones to record earthquake tremors and transmit the data for analysis.
- Geophysicists searching for oil by using seismic equipment. Sound impulses are put into the ground, and the echoes are recorded to image the subsurface rock layers and find petroleum traps.
- Apollo 11 astronaut Edwin Aldrin setting up the Passive Seismic Experiments Package (PSEP) on the Moon, with the Lunar Module in the background. The PSEP was designed to detect seismic vibrations on the Moon's surface.
- Strain Seismograph
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Aug 14, 2024 · A seismograph records oscillation of the ground caused by seismic waves that travel from their point of origin through Earth or along its surface.
- The Editors of Encyclopaedia Britannica
Aug 14, 2024 · 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.
- The Editors of Encyclopaedia Britannica
Aug 14, 2024 · Definitions of seismogram. noun. the graphical record of an earth tremor made by using a seismograph. see more.
Aug 21, 2024 · A seismometer detects seismic waves below the instrument and records them as a series of zig-zags. Scientists can determine the time, location and intensity of an earthquake from the information recorded by a seismometer. This record also provides information about the rocks the seismic waves traveled through.
5 days ago · It is calculated from earthquakes recorded by an instrument called seismograph. It is represented by Arabic Numbers (e.g. 4.8, 9.0). Intensity on the other hand, is the strength of an earthquake as perceived and felt by people in a certain locality.
Aug 16, 2024 · The scientific method is a series of steps that scientific investigators follow to answer specific questions about the natural world. Scientists use the scientific method to make observations, formulate hypotheses, and conduct scientific experiments . A scientific inquiry starts with an observation.
