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The initial point of rupture is called the hypocenter or focus, while the ground level directly above it is the epicenter. Earthquakes are primarily caused by geological faults, but also by volcanic activity, landslides, and other seismic events. The frequency, type, and size of earthquakes in an area define its seismic activity, reflecting the ...
An earthquake is what happens when the seismic energy from plates slipping past each other rattles the planet's surface. Those seismic waves are like ripples on a pond, the USGS said.
In 1961, waste water was injected into deep strata, and this was later found to have caused a series of earthquakes. [ 41 ] The 2011 Oklahoma earthquake near Prague , of magnitude 5.8, [ 42 ] occurred after 20 years of injecting waste water into porous deep formations at increasing pressures and saturation. [ 43 ]
Seismology (/ s aɪ z ˈ m ɒ l ə dʒ i, s aɪ s-/; from Ancient Greek σεισμός (seismós) meaning "earthquake" and -λογία (-logía) meaning "study of") is the scientific study of earthquakes (or generally, quakes) and the generation and propagation of elastic waves through planetary bodies.
An earthquake is a phenomenon that results from the sudden release of stored energy in the Earth's crust that creates seismic waves. At the Earth's surface, earthquakes may manifest themselves by a shaking or displacement of the ground and sometimes cause tsunamis, which may lead to loss of life and destruction of property. An earthquake is ...
The magnitude of an earthquake depends in part on the length of the geological fault on which the quake occurs. Longer faults result in stronger earthquakes. There are no known faults capable of ...
The earthquake late Friday night, which shook an area near Oklahoma City, was in a patch that had nine disposal wells within a ten-mile (16-kilometer) radius, although not all of those wells were ...
The underground point of origin of the earthquake is called the seismic focus. The point directly above the focus on the surface is called the epicenter . Earthquakes by themselves rarely kill people or wildlife – it is usually the secondary events that they trigger, such as building collapse, fires, tsunamis and volcanic eruptions, that ...