- 1 What Seismology means?
- 2 What is seismograph explain its working?
- 3 What is seismology Class 8?
- 4 What is the importance of seismograph?
- 5 Where do most earthquakes occur?
- 6 What does Phivolcs stand for?
- 7 Who uses seismometer?
- 8 What does seismometer mean?
- 9 What is difference between seismograph and Richter Scale?
- 10 Who named earthquakes?
- 11 How are earthquakes caused Class 8?
- 12 What can a seismograph tell us?
- 13 What information does a seismogram provide?
- 14 How do seismometers affect people’s lives?
What Seismology means?
Seismology, scientific discipline that is concerned with the study of earthquakes and of the propagation of seismic waves within the Earth. A branch of geophysics, it has provided much information about the composition and state of the planet’s interior.
What is seismograph explain its working?
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. Seismographs operate on the principle of inertia. Modern research seismometers are electronic, and detect and record motions in all directions.
What is seismology Class 8?
Answer: Seismology is the scientific study of earthquakes and their related phenomena.
What is the importance of seismograph?
A seismometer, or seismograph, is a device that geologists use to measure and record seismic waves. By studying these recordings, scientists can map the earth’s interior, and they can measure or locate earthquakes and other ground motions.
Where do most earthquakes occur?
Where do earthquakes occur?
- The world’s greatest earthquake belt, the circum-Pacific seismic belt, is found along the rim of the Pacific Ocean, where about 81 percent of our planet’s largest earthquakes occur.
- The Alpide earthquake belt extends from Java to Sumatra through the Himalayas, the Mediterranean, and out into the Atlantic.
What does Phivolcs stand for?
The Philippine Institute of Volcanology and Seismology ( PHIVOLCS ) is a service institute of the Department of Science and Technology (DOST) that is principally mandated to mitigate disasters that may arise from volcanic eruptions, earthquakes, tsunami and other related geotectonic phenomena.
Who uses seismometer?
Seismometer are used by seismologists to measure and record seismic waves. By studying seismic waves, geologists can map the interior of the Earth, and measure and locate earthquakes and other ground motions. The term seismograph is usually interchangeable, but seismometer seems to be a more common usage.
What does seismometer mean?
A seismometer is the internal part of the seismograph, which may be a pendulum or a mass mounted on a spring; however, it is often used synonymously with ” seismograph “. Seismographs are instruments used to record the motion of the ground during an earthquake.
What is difference between seismograph and Richter Scale?
A seismograph is what scientists use to actually measure the earthquake and the Richter scale is a way of putting the data into an understandable context. For example an earthquake that measures 5.0 on the Richter scale is ten times larger than an earthquake that measured 4.0.
Who named earthquakes?
The cause of earthquakes was stated correctly in 1760 by British engineer John Michell, one of the first fathers of seismology, in a memoir where he wrote that earthquakes and the waves of energy that they make are caused by “shifting masses of rock miles below the surface”.
How are earthquakes caused Class 8?
Earthquakes are caused due to sudden tectonic movements in the earth’s crust. When the tectonic plates slide over one another, there is a cause of orogeny which results in earthquakes and volcanoes.
What can a seismograph tell us?
A seismograph, or seismometer, is an instrument used to detect and record earthquakes. Generally, it consists of a mass attached to a fixed base. During an earthquake, the base moves and the mass does not. The motion of the base with respect to the mass is commonly transformed into an electrical voltage.
What information does a seismogram provide?
A seismogram is a graph output by a seismograph. It is a record of the ground motion at a measuring station as a function of time. Seismograms typically record motions in three cartesian axes (x, y, and z), with the z axis perpendicular to the Earth’s surface and the x- and y- axes parallel to the surface.
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.