A seismograph is the primary earthquake measuring instrument. The seismograph produces a digital graphic recording of the ground motion caused by the seismic waves. The digital recording is called a seismogram. A network of worldwide seismographs detects and measures the strength and duration of the earthquake’s waves.
What instrument is used to measure the intensity of an earthquake?
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.
How do we measure its magnitude and intensity?
Magnitude measures the energy released at the source of the earthquake . Magnitude is determined from measurements on seismographs
What is the intensity of an earthquake?
The effect of an earthquake on the Earth’s surface is called the intensity. ... The Modified Mercalli Intensity
How do we measure intensity of earthquake Class 11?
A seismograph is the primary earthquake measuring instrument. The seismograph produces a digital graphic recording of the ground motion caused by the seismic waves. The digital recording is called a seismogram. A network of worldwide seismographs detects and measures the strength and duration of the earthquake’s waves.
What is difference between magnitude and intensity?
Magnitude is a measure of earthquake size and remains unchanged with distance from the earthquake. Intensity, however, describes the degree of shaking caused by an earthquake at a given place and decreases with distance from the earthquake epicentre .
What is the strongest intensity scale?
Intensity X (10) is the highest value on the MMI. Learn more: Earthquake Magnitude
How is intensity measured?
Intensity is an objective measure of the time-averaged power density of a wave at a particular location. The SI unit of intensity is the watt per square meter . ... When the amplitude of a sound wave is measured by the maximum change in density of the medium in bulk, its intensity is equal to...
What are two causes of earthquakes?
- Volcanic Eruptions. The main cause of the earthquake is volcanic eruptions.
- Tectonic Movements. The surface of the earth consists of some plates, comprising of the upper mantle. ...
- Geological Faults. ...
- Man-Made. ...
- Minor Causes.
How are earthquakes classified?
Earthquakes are also classified in categories ranging from minor to great , depending on their magnitude. ... The classification starts with “minor” for magnitudes between 3.0 and 3.9, where earthquakes generally begin to be felt, and ends with “great” for magnitudes greater than 8.0, where significant damage is expected.
What is the highest intensity of earthquake?
| Mag Alternative Name | 1. 9.5 Valdivia Earthquake | 2. 9.2 1964 Great Alaska Earthquake, Prince William Sound Earthquake, Good Friday Earthquake | 3. 9.1 Sumatra-Andaman Islands Earthquake, 2004 Sumatra Earthquake and Tsunami, Indian Ocean Earthquake | 4. 9.1 Tohoku Earthquake |
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What four factors affect the intensity of an earthquake?
When an earthquake strikes, the intensity of earthquake shaking determines the severity of damage. In turn, the main factors affecting earthquake shaking intensity are earthquake depth, proximity to the fault, the underlying soil, and building characteristics—particularly height .
How strong is intensity 4 earthquake?
| Intensity Scale Shaking | I Scarcely Perceptible | II Slightly Felt | III Weak | IV Moderately Strong |
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Is a magnitude 11 earthquake possible?
Like a magnitude 10 or larger? No, earthquakes of magnitude 10 or larger cannot happen . The magnitude of an earthquake is related to the length of the fault on which it occurs. That is, the longer the fault, the larger the earthquake.
What is the example of intensity?
The definition of intensity is the quality of being very strong, concentrated or difficult or the degree to which something is difficult or strong. An example of intensity is having the ability to run miles on end at a top speed . An example of intensity is how quickly a treadmill is moving.
What is magnitude example?
Magnitude is defined as large in size or very important. An example of magnitude is the depth of the Grand Canyon . An example of magnitude is the size of the problem of world hunger. (geology) A measure of the amount of energy released by an earthquake, as indicated on the Richter scale.
