Earthquake

An earthquake is the sudden, violent shaking of the ground caused by the release of stored energy in the Earth’s crust. It occurs when tectonic plates, which are constantly shifting, lock together and then suddenly slip, creating seismic waves that radiate outward from a source known as the focus (or hypocenter). YouTube YouTube +5 Key Details About Earthquakes Cause: Most earthquakes are caused by the movement of tectonic plates, but they can also result from volcanic activity, explosions, or mining. Location: The point inside the Earth where the earthquake begins is the focus or hypocenter, while the point directly above it on the surface is the epicenter. Measurement: Magnitude: Measures the energy released, calculated by a seismograph. Intensity: Measures the shaking strength and damage to the environment/structures, often using Roman numerals (e.g., I-XII). Types: Tectonic: Caused by movement of tectonic plates. Volcanic: Resulting from volcanic activity. Collapse: Caused by underground explosions or cavern collapses. Sequence: A small earthquake that happens before a larger one is called a foreshock. The main, largest earthquake is the mainshock, which is followed by smaller earthquakes called aftershocks. NASA Space Place (.gov) NASA Space Place (.gov) +5 Earthquakes range in size from weak tremors that are not felt to violent shakes that destroy cities. Wikipedia Wikipedia +1