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www.reference.com/science/difference-between-earthquake-aftershock-4ed5d3f63204076d

According to the Southern California Earthquake Center (SCEC), the difference between an earthquake, also known as the mainshock, and an aftershock is that an aftershock follows closely in the wake of a larger earthquake and in approximately the same area as that earthquake. Earthquakes are usually

www.reference.com/science/earthquake-d1738ba84e32afa3

An earthquake is a sudden shaking or rolling of the ground caused by movements under the earth's surface. Some earthquakes can be mild while others may be severe causing massive devastation to structures, life and other natural resources.

www.reference.com/science/happens-during-earthquake-d6e0a718930d7bef

Earthquakes are caused by sudden movement in opposing tectonic plates in the earth. As plates move against each other, sometimes the rocky edges catch against one another. The rest of the plate remains in motion, putting stress on the sticking point, and when it gives way, an earthquake occurs.

www.reference.com/article/causes-earthquake-e0d073551249a7d

Earthquakes occur when two blocks of Earth's crust slip past each other suddenly. Tectonic plates fit together like pieces of a puzzle and are continually moving. The edges of tectonic plates are rough and sometimes stick, causing an earthquake when they break free.

www.reference.com/science/first-earthquake-69c7ae0c417db317

The first earthquake to ever take place is unknown as it happened before the records of the events were kept. The first recorded earthquake was in 1769.

www.reference.com/article/10-earthquakes-623d024db19b4849

Earthquakes are natural processes that occur beneath the earth's surface and, if strong enough, their reverberations can not only be felt by humans but can induce significant damage to the environment. Scientists are constantly striving to learn more about the causes and processes of earthquakes. Th

www.reference.com/article/earthquakes-start-b21e5007f3ec1903

Earthquakes are caused by the collision of tectonic plates. These plates are a part of the Earth's crust. Continents float on tectonic plates that move very slowly over centuries. There are many tectonic plates all over the Earth's crust.

www.reference.com/science/different-types-earthquakes-8fcfd286f40bfa87

The three main types of earthquakes are transform, convergent and divergent. Transform fault earthquakes are sometimes called strike-slip earthquakes because they occur when tectonic plates slide against one another. Convergent earthquakes occur when land masses are thrust toward each other, while d

www.reference.com/article/state-earthquakes-8ecef63d97dd301d

The U.S. Geological Survey reports that, as of 2014, Alaska accounts for about half of all earthquakes registered in the United States. The USGS also indicates that many smaller magnitude earthquakes go unreported in the state. California has the second-most reported earthquakes among U.S. states.

www.reference.com/science/earthquake-form-25d7c6849ed4d2c

Earthquakes happen when the boundaries of the Earth's tectonic plates bump and slide past one another; sometimes, they get stuck on jagged edges and cause earthquakes once they are released. These earthquakes are always followed by aftershocks starting from the same epicenter.