HOW EARTHQUAKES FORM

Earthquakes are formed when rocks in the Earth’s crust suddenly break or slip along a fault line, releasing a burst of energy. This energy travels through the ground as seismic waves, which we feel as shaking. 🌍 Step-by-Step: How Earthquakes Happen 1. Tectonic Plates Are Always Moving Earth’s surface is made of massive pieces called tectonic plates. These plates move slowly but constantly, pressing against, pulling away, or sliding past each other. 2. Stress Builds Up As the plates move, they sometimes get stuck along faults (cracks in Earth’s crust). When they can’t move freely, stress builds up over time. 3. Sudden Release = Earthquake Eventually, the stress becomes too great. The rocks snap or slip suddenly, releasing energy. This energy radiates out from the focus (the exact point underground where the break happened). 4. Seismic Waves Shake the Ground These waves travel through the Earth, causing the shaking we feel. The epicenter is the point directly above the focus on the Earth's surface — usually where shaking is strongest. ⚡️ What Causes the Most Earthquakes? Plate boundaries, especially: Transform boundaries (plates sliding past) → e.g., San Andreas Fault (California) Convergent boundaries (plates colliding) → e.g., Japan, Indonesia Volcanic activity Magma moving underground can cause smaller volcanic earthquakes. Human activity (less common) Mining, dam construction, and even underground explosions or drilling (fracking) can trigger small quakes. 🌐 Quick Earthquake Facts Largest earthquake ever recorded: 1960, Chile — magnitude 9.5 Can cause: landslides, tsunamis, building collapses Measured with: seismographs and the Richter or Moment Magnitude Scale

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