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Why do earthquakes happen

Why do earthquakes happen


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Depending on where you live on the planet, you will be more or less used to earthquakes. While some know the earthquakes for having experienced them on occasion or even habitually, others only know about earthquakes from the television news. We explain why earthquakes occur.

1. How does an earthquake occur? The Earth's crust is made up of tectonic plates that are constantly moving even if we don't notice it. However, there are places where these plates encounter an obstacle in their movement and when they collide is when the earthquake occurs, which can also be called earthquake or seism. This is the tectonic earthquake, which is the most common, although there may also be a volcanic earthquake.

2. What is a failure? The key place where the earthquake occurs is the mistake, which is a kind of crack in the earth's crust and where the tectonic plates end up colliding. There are active faults that are more at risk of producing earthquakes and there are other inactive faults where an earthquake is rarely noticed. The best known fault is the San Andrés fault in California (USA) where earthquakes are a common phenomenon.

3. How many earthquakes are there in the world? Although there may be more than 300,000 earthquakes a year around the world, only a few are strong enough that we can notice them. The consequences of earthquakes vary depending on their intensity, becoming one of the most devastating natural phenomena. The magnitude of an earthquake is measured in the Ritcher scale, which is what measures the energy released when the plates collide.

4. Why are there more earthquakes in some countries than in others? A large percentage of earthquakes occur in the areas bathed by the Pacific, from Japan or Indonesia reaching the coast of the American continent. Not only California has a high risk of earthquakes, but also places like Mexico, Chile or Peru. It must be remembered that an earthquake is not a phenomenon that can be to prevent, but areas that are used to earthquakes usually have action protocols to protect people.

5. Can there be an earthquake in the sea? Yes. Many times earthquakes occur in a fault washed by the sea. Its expansion wave generates gigantic waves called tsunamis. When a tsunami reaches shore, its consequences can be devastating.

Laura Velez. Editor of our site

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Video: What causes an earthquake? Natural Disasters (November 2022).