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Earthquakes What is an earthquake? Earthquakes start by the plates underneath the ground. When earthquakes start they have a humongous shake that can cause up to over 5.0 magnitude. What dose earthquake mean??? The word earthquake is used to describe any seismic event weather a natural phenomenon (an observable fact or an event) caused by humans – that generates seismic waves. Earthquakes are caused mostly by rupture of geological faults, but also by volcanic activity, landslides, mine blasts and nuclear experiments. Where do earthquakes occur? No part of the Earth's surface is free from earthquakes, but some regions experience them more often . They are most common at tectonic plate boundaries where different plates meet. The largest events usually happen where two plates are smashing, particularly around the edge of the Pacific Plate in New Zealand, Papua New Guinea, Japan and the Americas. Types of earthquakes Earthquake fault types Normal and the thrust faulting are examples of dip slip, where the displacement along the fault is in the direction of dip and movement on them involves a vertical component. Strike-slip faults are steep structures where the two sides of the fault slip horizontally past each other transform boundaries are a particular type of strike-slip fault. How are earthquakes detected? An earthquake, one of the most dreaded natural disasters, is technically a seismic event that generates seismic waves causing the ground to vibrate. An earthquake occurs as a result of a sudden release of energy in the Earth’s crust creating seismic waves. We all are aware of the fact that high-intensity earthquakes can result in a massive destruction of life and property. How do we measure an earthquake? Scientists measure the earthquake. They measure it by something called a Richter scale. How dose it work? The Richter scale is on a table, when an earthquake start it starts shaking by the table and it prints a squiggly line. An if It Is big it means it is going to go up and down a lot. How to stay safe from an earthquake When it is a small earthquake just stay underneath a desk. When it is a big earthquake go near a wall and stay calm.