EARTHQUAKE

Hi friends !

Today we are going to grasp about earthquake. we all are quite used to the word "earthquake", but many of us don't know how it takes place or how strong it can be or what type of an earthquake it is.

To make your time useful , i am going to give you the information about it.

Let's begin.......

what is an earthquake? how is it formed?

An earthquake occurs when the structure of the earth shifts and moves. One of the causes is due to the movement of the molten rock down in the earth's crust. The rocks become soft when they are exposed to the great heat of the interior of the earth, and this change makes them move.Because of this movement beneath, we on the surface feel that the ground is shaking. It is called an earthquake. The volcanic eruption  also causes earthquakes.

There are 2 kinds of earthquakes , namely- volcanic & tectonic.

how an earthquake is measured? 

It is measured by using Richter scale and Mercalli scale.

RICHTER SCALE:it is used to measure the total energy released during an earthquake.

MERCALLI SCALE:it is used to access the efforts of a quake at a particular place, rather than to measure the overall power.

What is seismic belt? 

some regions of the earth are prone to earthquake These regions are called Seismic Belts.

How strong is an earthquake?

The strength of an earthquake is called intensity . Scientists use the modified mercalli scale to describe the intensity of an earthquake . the higher the number , stronger is the earthquake.On the modified mercalli scale "1" stands for the weakest earthquake and "12" stands for the strongest . 

FUN FACTS 😃

#THE EARTHQUAKE  WAVES TRAVEL FAST IN SOLID ROCKS.

#THE MOST DESTRUCTIVE TYPE OF EARTHQUAKE IS TECTONIC.

#THERE ARE THREE TYPES OF EARTHQUAKES NAMELY SHALLOW, INTERMEDIATE & DEEP.

#WHEN AN EARTHQUAKE STRIKES TREMORS SPREAD TOWARDS IN SEISMIC WAVES.

SEISMIC GAP

Seismic gaps are places in active earthquake zones where there has been no earthquakes activity. This is where the big earthquake will probably occur.

FAULT

A fault is a fracture in rock along which large blocks of rocks have slipped past each other . Faults usually occur in fault zone,which are often along the boundaries between tectonic plates. Faults are typically caused by earthquakes.

RIFT VALLEY

Rift valleys are huge, trough shaped valleys created by faulting , such as africa's great rift valley. The floor is a thrown down block called a graben. Some geologists think they are caused by tension , others by compression .

COMPRESSION FAULT

Compression faults are faults  caused by rocks being squeezed together , perhaps by converging plates.

TENSION FAULT

Tension faults are faults caused by rocks being pulled together, perhaps by diverging plates.

 

The reverse fault and normal fault .

I hope that I am done with a little information about earthquake . if you want to know more about earthquakes in an animated way then click here . 

Thank you all for spending your time to grasp the information given !!😀😀

Bye!!! See you soon in my next post ....

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Bye!!!✋✋✋✋✋✋

#TODAY'SLEARNING

Hi guys !! ,

Today we are going to see some fun facts about earth & space .

Before we see some fun-facts , we shall know about some topics....

#what is solar system ? 

Solar means  sun. The solar system is centered around the sun , the shining ball in the sky. It includes the family of eight planets orbiting the sun , as well as the moons of these planets, and smaller objects , such as comets , asteroids , and bits of space rock. The powerful pull of an invisible force is called gravity from the sun stops these bodies from flying off into deepest space .

#is it true ?

All planets have one moon ?

No. Our planet earth has one moon. But many of the planets have more than one. Our neighbour Mars, for instance , has two! Only the two planets closest to the sun -mercury & Venus - have no moons at all.

#what's special about our planet ?

As far as we know , earth is the only planet in the solar system that has life. As well as warmth from the sun,  the other main ingredient for life is liquid water. Earth has plenty of water - in total , it covers about three quarters of the planet's surface!!

#is it true ?

There was life on earth from the start .

No. When earth first formed it was extremely hot and there was no oxygen. Over millions of years , the planet cooled , oceans formed and oxygen was made. The first life on earth appeared about 3million years ago.

#what does earth look like from space ?

 It looks beautiful - blue with swirling white clouds. Astronauts in space spend most of their free time gazing at it. They can even make out cities, when they are lit up at night with twikling lights.

#Amazing!

The earth is magnetic. At the center of the earth is a core of a molten metal called iron, which makes our planet like a giant magnet. This is what pulls the needle on a compass towards the magnetic north pole. 

# why does our sky go dark at night ?

Like all planets, the earth is spinning as it orbits the sun .

When your part of the planet is facing away from the sun ,  its light is blocked out .

At the same time , it is daytime for the people on the opposite side of the earth.

Source: earth and space book.

Okay guys.....

I think we are done with the maximum of our information for today .....

thank you guys for grasping the information !! 

Hope you like my article !!😊😊

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 Have a very good day .....

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~Bhavna A