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

    3 days ago · Earthquake, any sudden shaking of the ground caused by the passage of seismic waves through Earth’s rocks. Earthquakes occur most often along geologic faults, narrow …

  2. What is an earthquake and what causes them to happen?

    What is an earthquake and what causes them to happen? An earthquake is caused by a sudden slip on a fault. The tectonic plates are always slowly moving, but they get stuck at their edges …

  3. Earthquake - Wikipedia

    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 …

  4. What Causes Earthquakes? What Is an Earthquake?

    May 6, 2025 · Key Points About Earthquakes An earthquake is a sudden shaking of the Earth’s surface caused by a release of energy. Most earthquakes result from tectonic activity, …

  5. What is an Earthquake? Understanding the Shaking Ground …

    Apr 1, 2025 · An earthquake is one of nature’s most powerful and destructive forces, shaking the Earth’s surface with a tremendous force that can level cities, cause tsunamis, and change the …

  6. What is a earthquake? - The Institute for Environmental Research …

    Jun 16, 2025 · An earthquake is a sudden and violent shaking of the ground, caused by the passage of seismic waves through the Earth’s crust. These waves are generated when energy …

  7. What is an earthquake | Earth Observatory of Singapore, NTU

    An earthquake is the sudden release of strain accumulated for years and even centuries in the Earth’s crust. Slowly moving tectonic plates cause the strain to build up over time. When the …

  8. What Is an Earthquake? | NASA Space Place – NASA Science for …

    Sep 25, 2025 · What Is an Earthquake? An earthquake is an intense shaking of Earth’s surface. The shaking is caused by movements in Earth’s outermost layer. Why Do Earthquakes …

  9. Earthquake facts and information | National Geographic

    Earthquakes occur more often than you think. Here’s what you need to know about where they usually happen and how they’re measured.

  10. 6.1: What is an Earthquake? - Geosciences LibreTexts

    An earthquake is the shaking caused by the rupture (breaking) and subsequent displacement of rocks (one body of rock moving with respect to another) beneath the Earth’s surface.