explain the 4 different type of earthquake
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Answer:
There are many different types of earthquakes: tectonic, volcanic, and explosion. ... The most common are tectonic earthquakes. These occur when rocks in the earth's crust break due to geological forces created by movement of tectonic plates. Another type,volcanic earthquakes, occur in conjunction with volcanic activity.
Explanation:
Answer:
Types of Earthquakes
1. Tectonic Earthquakes
The earth’s crust is composed of loose, cracked fragments of land referred to as tectonic plates. These plates are capable of moving slowly and gradually. The movement of these plates occurs in different forms; towards each other, away from each other, sliding past each other or colliding with each other. A huge tremor occurs when 2 moving tectonic plates slide over one another. This type of earthquake is known as a tectonic earthquake.
. Volcanic Earthquakes
Compared to tectonic earthquakes, volcanic earthquakes are less prevalent. They typically take place before or after an eruption. Volcanic earthquakes come in two forms: long-period volcanic earthquakes and volcano-tectonic earthquakes. Volcano-tectonic earthquakes usually happen after a volcanic eruption. During an earthquake, magma erupts from inside the earth’s crust leaving a space behind. The space left after magma eruption must be filled. To fill it, rocks move towards the space resulting in severe earthquakes.
On numerous occasions, magma blocks the vents during volcanic activity. This means that high pressure fails to be released. The buildup of pressure becomes unbearable and releases itself with a massive explosion. The massive explosion results in a ruthless earthquake.
On the other hand, a long period of volcanic earthquake takes place after a volcanic eruption. Some days prior to the massive explosion, the magma inside the earth’s crust experiences rapid changes in heat. The change in heat triggers seismic waves, resulting in an earthquake.
. Explosion Earthquake
These are caused by nuclear explosions. They are, essentially, man triggered kind of earthquakes and represent the biggest impact of modern-day nuclear war. During the 1930s nuclear tests conducted by the United States, numerous small towns and villages were devastated as a result of this grave act.
. Collapse Earthquakes
These kinds of earthquakes are generally smaller and most commonly occur near underground mines. They are sometimes referred to as mine bursts. Collapse earthquakes are instigated by the pressure generated within the rocks. This kind of earthquake leads to the collapse of the roof of the mine instigating more tremors. Collapse earthquakes are prevalent in small towns where underground mines are located.