An instrument used for recording the vibrations caused by earthquakes is known as seismograph or seismometer. The vibrations are recorded on a strip of paper and the diagram produced is known as a seismogram. Numerous models of seismographs are in current use.
What is seismograph explain its working with the help of diagram?
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. ... Modern research seismometers are electronic, and detect and record motions in all directions.
What is seismograph explain?
Seismographs are instruments used to record the motion of the ground during an earthquake . ... As the seismograph shakes under the mass, the recording device on the mass records the relative motion between itself and the rest of the instrument, thus recording the ground motion.
What is a seismograph Class 8?
Seismograph is an instrument which measures and records the magnitude of an earthquake in terms of the shock waves it produces . Seismograph detects the shock waves produced by an earthquake and also records the shock waves on the paper in the form of a graph. Seismograph is also known as seismometer.
What is a seismograph draw a Labelled diagram of seismograph?
Answer : Seismograph is the instrument which is used to measure and record an earthquake. The tremors produce waves on the surface of the earth. ... These waves are recorded by the seismograph. Following is the well labelled diagram of a seismograph.
What are the three types of seismographs?
To overcome this problem, modern seismograph stations have three separate instruments to record horizontal waves – (1) one to record the north-south waves, (2) another to record east-west waves , and (3) a vertical one in which a weight resting on a spring tends to stand still and record vertical ground motions.
How is the seismograph used today?
A modern seismograph can help scientists detect earthquakes and measure several aspects of the event : The time at which the earthquake occurred. The epicenter, which is the location on the surface of the earth below which the earthquake occurred.
What is seismology used for?
1 Concept. Seismology is the science of earthquakes to study the causes and effects of minute pulsation to most catastrophic natural phenomenon inside the earth . The method can be classified broadly into two major divisions depending on the energy source of the seismic waves.
What is the Richter scale?
The Richter magnitude scale, also known as the local magnitude (M) scale, assigns a number to quantify the amount of seismic energy released by an earthquake . It is a base-10 logarithmic scale. Micro earthquakes, not felt. Generally not felt, but recorded.
How do seismometers affect people’s lives?
Seismographs can detect quakes that are too small for humans to feel . During an earthquake, ground-shaking seismic waves radiate outward from the quake source, called the epicenter. ... These measurements allow scientists to estimate the distance, direction, magnitude, and the type of earthquake that just occurred.
What is the scientific name for earthquake?
Seismology (/saɪzˈmɒlədʒi, saɪs-/; from Ancient Greek σεισμός (seismós) meaning “earthquake” and -λογία (-logía) meaning “study of”) is the scientific study of earthquakes and the propagation of elastic waves through the Earth or through other planet-like bodies.
What are the four types of seismic zones?
Based on the past seismic history, Bureau of Indian Standards grouped the country into four seismic zones namely Zone-II, Zone-III, Zone-IV and Zone-V . Of all these four zones, Zone-V is the most seismic active region whereas Zone-II is the least.
What is Richter scale short answer?
Richter scale (M L ), quantitative measure of an earthquake’s magnitude (size), devised in 1935 by American seismologists Charles F. ... The earthquake’s magnitude is determined using the logarithm of the amplitude (height) of the largest seismic wave calibrated to a scale by a seismograph.
Are P waves surface waves?
Seismic waves fall into two general categories: body waves (P-waves and S-waves), which travel through the interior of the earth, and surface waves, which travel only at the earth’s surface .
Which of the following best describe a seismograph?
The correct statements for a seismograph are following –
It has a curved graphing surface . It is used to locate an earthquake’s epicenter. It uses a needle on graph paper to measure seismic wave activity. The seismograph is also called as the seismometer.
What four activities can trigger a tsunami?
Tsunamis are caused by violent seafloor movement associated with earthquakes, landslides, lava entering the sea, seamount collapse, or meteorite impact . The most common cause is earthquakes.
