Reasons for different types of earthquakes
Rock-mass movements cause displacement across the faults. A fault is a planar fracture or discontinuity in a volume of rock. Such movement on the faults is generally a response to long-term deformation and the buildup of stress. These sudden movements along faults are responsible for earthquakes. The elastic-strain energy released due to the displacement forms the shock or seismic waves. Depending on the density, seismic waves propagate through the ground very fast. These waves bend and refract like a light while passing through the earth, shaking the ground surface. The epicenter is the point on the earth’s surface vertically above the focus of an earthquake. The focus is often miles beneath the earth’s surface. Focus (aka hypocenter) is the location on the earth where the earthquake begins.
This fishbone shares knowledge about various types of earthquakes and some potential causes.
Curated from community experience and public sources: