A 5.7 earthquake caused extensive damage to the two-story ranch-style home of Joseph and Mary Reneau near the community of Sparks in Lincoln County, OK. An earthquake is a shaking of the ground, usually suddenly and violently, that can cause a lot of damage. What Causes An Earthquake ? Earthquake refers to a sudden violent shaking and vibration of the earth surface resulting from underground movement along a fault plane or from volcanic activity. Every year, at least one earthquake with a magnitude over 8 — a "great" quake — wreaks havoc. The 2016 Ecuador earthquake occurred on April 16 at 18:58:37 ECT with a moment magnitude of 7.8 and a maximum Mercalli intensity of VIII (Severe).The very large thrust earthquake was centered approximately 27 km (17 mi) from the towns of Muisne and Pedernales in a sparsely populated part of the country, and 170 km (110 mi) from the capital Quito, where it was felt strongly. When this happens, the overriding plate snaps back into an unrestrained position. Earthquakes from 7 to 8 are major; about 15 of these occur annually. Factors causing damage to the building | Building Construction. Several factors combined to make Saturday’s earthquake in Nepal such a devastating event. The magnitude-9.0 earthquake struck at 2:46 pm. Hydraulic fracturing is a process used to extract natural gas or other fossil fuels from within the earth. This sudden motion is the cause of the tsunami - because it gives an enormous shove to the overlying water. The main cause is that when tectonic plates collide, one rides over the other, causing orogeny (mountain building), earthquakes and volcanoes.

Major damage to the building is usually caused by the natural calamities. It happens when there is sudden movement or breaking of the tectonic plates. Earthquakes are usually quite brief, but there may be many over a short time frame. A 2011 earthquake in Lorca, Spain caused a great amount of destruction for its 5.1 magnitude because its epicenter was located so close to the surface. The most common human causes of earthquakes #1 Hydraulic fracturing (fracking) or injection wells . An earthquake (also known as a quake, tremor or temblor) is the shaking of the surface of the Earth resulting from a sudden release of energy in the Earth's lithosphere that creates seismic waves.Earthquakes can range in size from those that are so weak that they cannot be felt to those violent enough to propel objects and people into the air, and wreak destruction across entire cities. What causes earthquakes? The magnitude-9.0 earthquake struck at 2:46 pm. The first was its basic magnitude. Earth's crust ranges from 3 to 45 miles deep (5 to 70 kilometers). Earthquakes are caused by tectonic movements in the Earth's crust.
The word natural is important here, since it excludes shock waves caused by French nuclear tests, man made explosions and landslides caused by building work.. The movement of the earth's crust and the plate boundaries, cause seismic activity, which causes the earth to rumble, causing the feel of an 'earthquake'. In particular, people believed that the breaks in the Earth's surface--faults--which appear after earthquakes, were caused *by* the earthquakes rather than the cause *of* them.


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