What is the paper record of a seismic event called

11.05.2021 By Najar

what is the paper record of a seismic event called


The terms seismograph and seismometer are often used interchangeably; however, whereas both devices may detect and measure seismic waves, only a seismograph possesses the capacity to record the phenomena. A record produced by a seismograph on a display screen or paper printout is called a seismogram. A helicorder is a device which records signals from a seismometer. The traditional helicorder records the seismic signal on a piece of paper which is wrapped around a rotating drum. A pen draws the signal on this paper. Each line of data represents a specific, constant time interval: for example, 1 hour per line.

Asked by Wiki User. A seismograph records data on a roll of paper. It is the record that is known as a seismograph The instrument used to produce the seismograph is known as a seismometer. It is a Seismograph. Most of vibrations can be detected and recorded by sensitive instruments called seismograph, callev seismometers. The record produced by a seismometer is called a seismogram.

If you are referring to the record printed on a chart by a seismograph, it seismicc called a seismogram.

If you are referring to a hand-written record of the events of an earthquake, this might be referred to as a journal. But seriously folks, it's called a "seismogram". Earthquakes are measured by a seismometer, also known as a seismograph. A seismograph is the device that scientists use to measure earthquakes. The goal of a seismograph is to accurately record the motion of the ground during a quake. Use a seismograph.

Use a Seismograph. A seismograph is a seismometer that records the strength of a disturbance on paper or other media. The trace produced by a seismograph is called a seismogram. Ask Question. See Answer. Top Seismkc. Wiki User Answered The answer to your question is a rotating drum of paper. Related Questions. Is it true or false that the paper record of a seismic event is called a seismograph?

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This is used to record the shaking? How do you detect and record earthquake? What is an instrument to detect and record earthquakes? What instrument is used to record a volcano? What is used to record shock waves? What is used to record the shaking rrecord a earthquake? How do you record earth movements? How is earthquake magnitude measured? What is the difference between veent seismograph and a seismometer? What are the tracings of motion created by a seismograph called?

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Magnitude and other units of measurement

The paper record of a seismic event is called a ____. solid core liquid core mantly. EArths structure consists of an inner, mostly iron, _____ ____ surrounded by a mostly iron ___ ____ surrounded by the ___. crust 5 to The outer most layer of the earth is the _____. It's about __ to __ km thick. Feb 24,  · A seismograph is a scientific instrument which records information about the duration, intensity, and direction of a seismic disturbance, classically an earthquake. In addition to registering earthquakes, seismographs can also track large explosions, tidal waves, and other events which cause the ground to shake. These devices are used to gather more information about seismic disturbances, . A record of the seismic waves created by a seismograph is a? Think it's a Seismogram. Is it true or false that the paper record of a seismic event is called a seismograph?

Seismograph , instrument that makes a record of seismic waves caused by an earthquake , explosion, or other Earth -shaking phenomenon. The terms seismograph and seismometer are often used interchangeably; however, whereas both devices may detect and measure seismic waves, only a seismograph possesses the capacity to record the phenomena. A record produced by a seismograph on a display screen or paper printout is called a seismogram.

An early seismic instrument called the seismoscope made no time record of ground oscillations but simply indicated that shaking had occurred. A Chinese scholar, Zhang Heng , invented such an instrument as early as ce. It was cylindrical in shape with eight dragon heads arranged around its upper circumference, each with a ball in its mouth.

Around the lower circumference were eight frogs, each directly under a dragon head. In Italian scientist Luigi Palmieri designed a seismograph that consisted of several U-shaped tubes filled with mercury and oriented toward the different points of the compass.

When the ground shook, the motion of the mercury made an electrical contact that stopped a clock and simultaneously started a recording drum on which the motion of a float on the surface of mercury was registered. This device thus indicated time of occurrence and the relative intensity and duration of the ground motion.

The basic problem in measuring ground motions is to attain a steady point that remains fixed when the ground moves.

Various types of pendulums have been used for that purpose. The simplest type is a common pendulum in which a heavy mass is suspended by a wire or rod from a fixed point as in a clock.

Other forms are the inverted pendulum, in which a heavy mass is fixed to the upper end of a vertical rod pointed at its lower end, and the horizontal pendulum, in which a rod with a mass on its end is suspended at two points so as to swing in a nearly horizontal plane instead of a vertical plane.

After a series of earthquakes struck near Perthshire, Scotland, in , a seismometer with an inverted pendulum was installed near Comrie in The first true seismograph, according to Italian seismologists, was created in by Italian physicist Filippo Cecchi. The motions produced by seismic waves would activate a clock, and the recording surface which tracked ground motion advanced 1 cm 0.

Seismograph developments occurred rapidly in when Scottish physicist Sir James Alfred Ewing , Scottish engineer Thomas Gray, and English geologist John Milne , who were working in Japan at the time, began to study earthquakes. Following a severe earthquake that occurred at Yokohama near Tokyo in that year, they organized the Seismological Society of Japan.

Milne successfully used that seismograph to record several earthquakes in Japan. Then, after returning to England, he established a small worldwide seismographic network using such instruments. The horizontal pendulum seismograph was improved greatly after World War II.

The Press-Ewing seismograph , developed in the United States for recording long-period waves , was widely used throughout the world. That device employed a Milne-type pendulum, but the pivot supporting the pendulum was replaced by an elastic wire to avoid friction. Article Introduction Development of the first seismographs Basic principles of the modern seismograph Applications of the seismograph Show more.

Videos Images. Additional Info. More About Contributors Article History. Table Of Contents. While every effort has been made to follow citation style rules, there may be some discrepancies. Please refer to the appropriate style manual or other sources if you have any questions. Facebook Twitter. Give Feedback External Websites. Let us know if you have suggestions to improve this article requires login. External Websites. Incorporated Research Institutions for Seismology - Seismographs.

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Learn with geophysicist Horst Rademacher on the working of a seismometer, how it records data by simulating an earthquake in the classroom. Geophysicist Horst Rademacher of the University of California, Berkeley, simulating an earthquake in the classroom and explaining how a simple seismograph records Earth's shaking.

Britannica Quiz. The Solid Earth Quiz. The term geology refers, according to Britannica, the fields of study concerned with the solid Earth. How solid is your knowledge of all things geological? Test your knowledge by taking this quiz. Model of Zhang Heng's seismoscope seismograph , which he invented about ce to detect earthquakes. A sketch of Italian scientist Luigi Palmieri's seismograph.

Get a Britannica Premium subscription and gain access to exclusive content. Subscribe Now. Horizontal pendulum seismograph, as invented by English seismologist John Milne in 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 plate was fixed on the top of a box containing a recording drum D. A ray of light from an oil lamp passed through both slits and formed a small spot of light on a sheet of light-sensitive graph paper bromide paper wrapped on the recording drum. The Press-Ewing seismograph, developed in the United States for recording long-period waves, was widely used throughout the world. Load Next Page.