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1. Dictionary

   Earth·quake

   /ˈərTHˌkwāk/

   

   noun

   • 1. a sudden and violent shaking of the ground, sometimes causing great destruction, as a result of movements within the earth's crust or volcanic action.
   • ▪ a great upheaval: "a political earthquake"

   Scrabble Points: 26

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2. www.britannica.com › science › earthquake-geologyEarthquake | Definition, Causes, Effects, & Facts | Britannica

   www.britannica.com › science › earthquake-geology

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   May 12, 2024 · An earthquake is a sudden shaking of the ground caused by the passage of seismic waves through Earth’s rocks. Learn about the causes, effects, and types of earthquakes, as well as the history and science of seismology.

3. en.wikipedia.org › wiki › EarthquakeEarthquake - Wikipedia

   en.wikipedia.org › wiki › Earthquake

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   In its most general sense, an earthquake is any seismic event—whether natural or caused by humans—that generates seismic waves. Earthquakes are caused mostly by the rupture of geological faults but also by other events such as volcanic activity, landslides, mine blasts, fracking and nuclear tests.

4. www.merriam-webster.com › dictionary › earthquakeEarthquake Definition & Meaning - Merriam-Webster

   www.merriam-webster.com › dictionary › earthquake

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   Learn the meaning of earthquake as a noun, with synonyms, examples, and word history. Find out how to use earthquake in a sentence and see related articles and entries.

5. www.usgs.gov › faqs › what-earthquake-and-whatWhat is an earthquake and what causes them to happen?

   www.usgs.gov › faqs › what-earthquake-and-what

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   An earthquake is a sudden slip on a fault that releases energy in waves and causes shaking. Learn about the types of faults, plates, and earthquakes in California and other regions from the USGS.

6. www.nationalgeographic.org › encyclopedia › earthquakesEarthquakes - National Geographic Society

   www.nationalgeographic.org › encyclopedia › earthquakes

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   Oct 19, 2023 · An earthquake is the sudden shaking of Earth's crust caused by the release of energy along fault lines or from volcanic activity. Learn about the types, causes, and effects of earthquakes, and see maps of major quakes in 2019.

7. People also ask

   How do earthquakes occur?

   • earthquake, any sudden shaking of the ground caused by the passage of seismic waves through Earth ’s rocks. Seismic waves are produced when some form of energy stored in Earth’s crust is suddenly released, usually when masses of rock straining against one another suddenly fracture and “slip.”

   Earthquake | Definition, Causes, Effects, & Facts | Britannica

   www.britannica.com/science/earthquake-geology

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   Why are earthquakes called tectonic earthquakes?

   • Of all these the release of elastic strain is the most important cause, because this form of energy is the only kind that can be stored in sufficient quantity in the Earth to produce major disturbances. Earthquakes associated with this type of energy release are called tectonic earthquakes. Special 30% offer for students!

   Earthquake | Definition, Causes, Effects, & Facts | Britannica

   www.britannica.com/science/earthquake-geology

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   What is the epicenter of an earthquake?

   • An earthquake's point of initial rupture is called its hypocenter or focus. The epicenter is the point at ground level directly above the hypocenter. The seismic activity of an area is the frequency, type, and size of earthquakes experienced over a particular time.

   Earthquake - Wikipedia

   en.wikipedia.org/wiki/Earthquake

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   What does earthquake mean in physics?

   • In its most general sense, the word earthquake is used to describe any seismic event that generates seismic waves. Earthquakes can occur naturally or be induced by human activities, such as mining, fracking, and nuclear tests. The initial point of rupture is called the hypocenter or focus, while the ground level directly above it is the epicenter.

   Earthquake - Wikipedia

   en.wikipedia.org/wiki/Earthquake

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8. spaceplace.nasa.gov › earthquakes › enWhat Is an Earthquake? | NASA Space Place – NASA Science for Kids

   spaceplace.nasa.gov › earthquakes › en

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   May 6, 2024 · An earthquake is an intense shaking of Earth’s surface caused by movements in its outermost layer, the lithosphere. Learn how earthquakes happen, how we measure them, and if they only happen on Earth.

9. www.usgs.gov › programs › earthquake-hazardsThe Science of Earthquakes | U.S. Geological Survey - USGS.gov

   www.usgs.gov › programs › earthquake-hazards

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   Learn what causes earthquakes, how they are measured and located, and how they affect the earth and its inhabitants. Find out how faults, tectonic plates, seismic waves, and seismographs are involved in the science of earthquakes.