Understanding Earthquakes: Causes, Hazards, and Impacts
An earthquake is a natural phenomenon that occurs when the Earth's crust shifts or breaks due to tectonic movements, volcanic activity, or human-induced activities such as underground explosions. It is characterized by the shaking or vibration of the ground, which can range from mild to extremely destructive. Earthquakes occur along faults, which are large cracks or fractures in the Earth's crust. When the rocks on either side of the fault move past each other, they create seismic waves that propagate through the Earth's crust and cause the ground to shake. The magnitude of an earthquake is measured on the Richter scale, which ranges from 0 to 10. Each increase of one unit on the scale represents a tenfold increase in the energy released by the earthquake. Very small earthquakes, with a magnitude of less than 2.0, are usually not felt by humans, while earthquakes with a magnitude of 7.0 or higher can cause widespread damage, injuries, and loss of life. Earthquakes can cause...