Did you know that almost 500,000 earthquakes happen every year? Of course, they all have different magnitudes and many are imperceptible unless you have access to a seismometer. The truth is that earthquakes are a natural phenomenon that arouses a lot of curiosity, possibly because they are unpredictable.
Precisely to delve into this phenomenon of geology and understand it better, we will dedicate this post by Green Ecologist to develop everything about what is an earthquake, how it occurs and its types, enter more related details. If it is of your interest, do not hesitate to continue reading.
Simply put, the word earthquake means "earth in motion" and it comes from Latin. However, in more technical terms, an earthquake is defined as a sudden movement or vibration of the earth's crust It is produced by the release of energy, contained from the interior of the Earth, in the form of seismic waves.
Earthquakes can be classified according to their origin, their magnitude and more ways, but all of them are characterized by being transitory, that is, they do not last more than a few seconds or, sometimes, minutes. Regarding its origin, there are some necessary concepts to understand the entire phenomenon. One of these concepts is hypocenter of an earthquake, defined as the point of origin of an earthquake. Another important concept is the epicenter of an earthquake, which is not more than the point of the earth's surface that is on the hypocenter. Next, we will know how they are produced, that is, their origin, among other details.
Earthquakes are generated, mainly, by the tectonic activity. This activity is based on the theory that the earth's surface, or better known as the Lithosphere, is made up of tectonic plates that slide and can collide each other, that's where tectonic activity arises. It is precisely this movement and collision between plates that causes the vast majority of earthquakes. Here you can learn more about what the lithosphere is.
However, there are many other causes that can trigger earthquakes and from these causes an extensive classification arises that we will detail in the next section. Also, in the video below you can learn more details about what an earthquake is and how it occurs.
As we mentioned, depending on the cause for which the earthquakes originate, they can be classified into two large groups:
There are many ways to measure earthquakes, some scales measure the magnitude of the earthquake, others simply measure the intensity. However, the most widely used scale is magnitude and is called Richter scale o scale of local magnitude (M). It is a logarithmic scale of magnitudes and is obtained from the relationship between the force and the energy released. Precisely the Richter scale allows us to measure earthquakes of magnitude 2 to 6.9 and depths from 0 to 400 kilometers.
For its part, seismological scale of magnitude of the moment, It is also frequently used since it allows to measure earthquakes of magnitudes greater than 6.9 and to determine with more precision the extreme values. This scale also measures the stiffness of the rock and the average distance of displacement.
Depending on the magnitude and intensity of the earthquake, there are many consequences that can be caused. Let's see here:
Now that you have been able to learn all this about what an earthquake is, how it occurs, its types and more details, we encourage you to know the volcanic and seismic regions of the world, where more earthquakes and volcanoes occur.
If you want to read more articles similar to Earthquake: what is it, how is it produced and typesWe recommend that you enter our Nature Curiosities category.
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