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  1. Earthquake magnitude and ground-shaking intensity . The Earth's crust is stressed by tectonic forces. When this stress becomes great enough to rupture the crust, or to overcome the friction that prevents one block of crust from slipping past another, energy is released, some of it in the form of various kinds of seismic waves that cause ground-shaking, or quaking.

    Seismic magnitude scales - Wikipedia

    https://en.wikipedia.org/wiki/Seismic_scale
  2. Earthquake Measurements: Magnitude vs Intensity

    www.earthquakeauthority.com › Blog › 2020

    Jul 22, 2020 · Earthquake intensity scales describe the severity of an earthquake’s effects on the Earth's surface, humans, and buildings at different locations in the area of the epicenter. There can be multiple intensity measurements.

  3. Seismic magnitude scales - Wikipedia

    en.wikipedia.org › wiki › Seismic_scale

    Earthquake magnitude and ground-shaking intensity . The Earth's crust is stressed by tectonic forces. When this stress becomes great enough to rupture the crust, or to overcome the friction that prevents one block of crust from slipping past another, energy is released, some of it in the form of various kinds of seismic waves that cause ground-shaking, or quaking.

  4. Modified Mercalli intensity scale - Wikipedia

    en.wikipedia.org › wiki › Mercalli_intensity_scale

    The modified Mercalli intensity scale (MM or MMI), developed from Giuseppe Mercalli's Mercalli intensity scale of 1902, is a seismic intensity scale used for measuring the intensity of shaking produced by an earthquake.

  5. 4.2-Magnitude Earthquake Hits Assam, Fifth Tremor To Hit ...

    www.ndtv.com › india-news › 4-2-magnitude-earthquake

    Jun 19, 2021 · A 4.2-magnitude earthquake struck Assam in the early hours of Saturday, the fifth such tremor to hit the northeastern region during the past 24 hours, officials said.

  6. Mercalli Earthquake Intensity Scale - ThoughtCo

    www.thoughtco.com › mercalli-earthquake-intensity

    Nov 04, 2019 · The Modified Mercalli Intensity Scale of 1931 is the basis for the U.S. evaluation of seismic intensity.Intensity is different than the magnitude in that it is based on observations of the effects and damage of an earthquake, not on scientific measurements.

  7. Earthquake in Delhi: Low-intensity earthquake hits Rohini ...

    zeenews.india.com › india › earthquake-in-delhi-low

    May 31, 2021 · An earthquake of magnitude 2.4 on the Richter scale hit the Rohini area in Delhi at 9:54 pm on Monday (May 31), the National Center for Seismology said. Since the intensity of the earthquake was low, no casualty or damage has been reported.

  8. What was the duration of the earthquake? Why don't you report ...

    www.usgs.gov › faqs › what-was-duration-earthquake

    The duration of an earthquake is related to its magnitude but not in a perfectly strict sense. There are two ways to think about the duration of an earthquake. The first is the length of time it takes for the fault to rupture and the second is the length of time shaking is felt at any given point (e.g. when someone says "I felt it shake for 10 seconds" they are making a

  9. The magnitude (for example, magnitude 5.7) represents the amount of energy released by the earthquake and is the same everywhere. The intensity of shaking, however, varies from place to place, and is quantified by something called the Modified Mercalli Intensity Scale (for example, Intensity IV).

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