Types Of Earthquakes

An earthquake is perhaps the most deadly and the most dangerous natural phenomenon of earth. It is characterized by the sudden tremors on earth’s surface caused due to the release of energy from its crust.

At times the tremors in an earthquake are of such a great intensity that they can collapse an entire city within the time span of just few seconds. Over the years many researches have been made as to how these earth quakes occur? Why they occur? and When do they occur?

Although geologists and scientists today have extensive information regarding their cause, they still are unable to predict when an earthquake will occur. However, there are certain areas which have been given the name of fault lines by the geologists as they believe that these areas are likely to go through an earthquake.

Damage caused by an earthquake in Peru.
Damage caused by an earthquake in Peru.

Even though it is still not possible to predict when an earthquake will occur, it is now easily possible to measure the magnitude of the tremors occurred in an earthquake.

In 1935 a device to measure the intensity and the magnitude of the seismic waves of an earthquake, was invented by an American seismologist Charles Richter.

The device is known as the Richter scale. The Richter scale has a scale from 1-9.

An earthquake that falls below the point of 4.5 in the Richter is called a minor one and does not cause much of harm; however an earth of magnitude above 4.5, according to the Richter scale, is capable of causing damage.

An earthquake above 7 is extremely severe and can cause a mass destruction.

Damage caused by an earthquake in California.
Damage caused by an earthquake in California.

An earthquake, simply defined as the shaking of the earth’s surface. On the basis of what causes this shaking, earthquakes are classified into four types. Following are the four types of earthquakes:

Tectonic Earthquakes

The earth’s crust consists of loose broken fragments of lands known as the tectonic plates. These tectonic plates have the ability to slowly and gradually move. Now, these plates can away from each other, towards each other, can collide or can slide past each other. 

Eruption in the Chaitn Volcano, Chile. Such eruptions can cause earthquakes.
Eruption in the Chaitn Volcano, Chile. Such eruptions can cause earthquakes.

When the two tectonic plates slide over each other a huge tremor takes place, and that’s how a tectonic earthquake occurs.

Tectonic earthquakes are the most common type of earthquake. It may be of small or of extremely high magnitude. Most of the mass destruction caused by an earthquake over the history is due to the tectonic earthquakes.

The tremors caused by tectonic earthquakes are mostly severe and if they are of high magnitude, they can completely destroy a whole city within seconds.

Volcanic Earthquakes

Volcanic earthquakes are comparatively less common than the tectonic earthquakes and usually occur either before or after a volcanic eruption.

There are two types of volcanic earthquakes: Volcano tectonic earthquakes and L ong period volcanic earth quakes.

The volcanic tectonic earthquakes occur usually after a volcanic activity has taken place. The magma that erupts during an earthquake leaves a space, to fill the space left by the magma the rocks move towards the space to fill it in, causing severe earthquakes.

Most of the times after the release of lava, the lava falls on its vent blocking it, and not letting the pressure release. The retained pressure does not stay for long; it releases with a huge explosion. The explosion causes a severe earthquake, mostly of extremely high magnitude.

The long period volcanic earthquakes occur post a volcanic eruption. Few days before the great explosion, the change in heat of magma below the earth’s surface creates seismic waves, causing an earthquake.

Entrance of a mine.
Entrance of a mine.

Collapse Earthquakes

Collapse earth quakes are comparatively small earthquakes and they take place around underground mines.

These earthquakes are also referred to as the mine bursts. The collapse earthquakes are caused by the pressure induced within the rocks.

It results in the collapse of the roof of the mine which causes further tremors. Collapse earthquakes are common in small towns near these underground mines.

The Nagasaki, Japan, atomic bombing.
The Nagasaki, Japan, atomic bombing.

Explosion Earthquakes

The explosion earthquakes are caused due to the nuclear explosions.

These man induced earthquakes are one of the biggest side effects of the modern nuclear war.

In the 1930s during the American nuclear tests many small villages and towns suffered through such tremors, many of them were completely destroyed due to this heinous act.

Facts About The Deadliest Earthquakes On Earth

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Comments 63 comments

Tracy Ann profile image

Tracy Ann 6 years ago from Washington

Nice article. English could use some work but very full of information. I have linked it to my own article about the next Mega-Thrust Earthquake in Washington State.


hassam profile image

hassam 6 years ago from Pakistan Author

Thanks! :)


Pahm 6 years ago

thanks.. it helped me a lot in my homework


priyanka 6 years ago

thanks it helped me know more abt earthquake nd helped me in my project


KLeichester 5 years ago

Good information you have here. Thanks a lot for sharing.


lyn 5 years ago

this articles give some information for my report


Anj 5 years ago

nice article ! helped me a lot with my homework . Thanks !


edmondpogi profile image

edmondpogi 5 years ago

Very informative post. You made some good points. I especially found it useful where you stated the value of technology.

Safety First Earthquake Emergency Campaign


zainulabedin 5 years ago

Great research on earth quake.

Thanks for sharing.


harshavi sunil keni 5 years ago

thanks

, its helped me to do my best and best project


Rockandrouge profile image

Rockandrouge 5 years ago from Valencia, Spain

Do you know that they could be caused by HAARP? ..


hassam profile image

hassam 5 years ago from Pakistan Author

Well I do know about this program and the conspiracy theories related to it which might be true to some extent.

But causing an earthquake measuring 9.0 on richter scale requires tremendous amount of energy, which even a nuclear explosion can't create.

None the less one cannot rule out the opinion that the research is aimed at creating destruction in the natural harmony of the planet.


tyu 5 years ago

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Jackie Lynnley profile image

Jackie Lynnley 5 years ago from The Beautiful South

I am just watching about one that lasted for days, wow and I thought staying out of California was the answer, lol. Great hub.


syed 5 years ago

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I was searching for stuff about earthquakes from the moment I woke up (9:00), to now. I have somme answers, but this site really dos'nt have a lot of information


hassam profile image

hassam 4 years ago from Pakistan Author

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