# What is an earthquake (Earthquake in Hindi) How does an earthquake occur? Basic information about earthquakes

Earthquake in hindiYou will all be familiar with the name earthquake. Have you ever wondered what an earthquake is like? How the whole earth starts shaking. Friends, in today’s article, we will know the basic information related to earthquake.

## What is Earthquake – What is Earthquake in hindi

Our earth is made up of many layers. The core of the Earth is still a ball of fire blazing like the Sun. Lava, blazing out from the center of the earth, collides with many layers of the earth while exiting. Due to which these layers start slipping. Due to which the whole earth trembles. This is what we call an earthquake.

## There are three types of tremors in an earthquake – Type of Earthquake in hindi

1. Primary wave—This wave passes through every medium inside the earth. Its average velocity is 8 km per second. This speed from all waves
happens more. Due to which these waves reach any place first.
2. Secondary waves –These are also called transverse waves. This wave passes only through solid medium. Its average velocity is 4 km per second.
3. L-wave These are also called by the name of surface or long waves. These waves were discovered by HD Love. Love waves them several times
Also called. Their other name is R-waves (Ray Light waves).

These waves are mainly confined to the surface. These solid, liquid and gas can pass through all three mediums (Earthquake in Hindi). Its 1.5-3 km per second.

Seismic waves are traced by an instrument called a seismograph. From this the following facts emerge regarding their behavior

1. The velocity of all seismic waves increases as they pass through denser objects.
and decreases when passing through low-density substances.
2. Only elementary waves can pass through the central part of the earth. But there their velocity decreases.
3. Secondary waves cannot pass through liquid matter.
4. L waves travel only near the surface.
5. These waves are reflected and refracted while passing through different mediums.

Center The place of origin of the earthquake is called its centre. All three types of waves P, S and L reach near the epicenter of the earthquake. In the interior of the earth, these waves change their path and travel inwards on a concave path.

P and S-waves reach a distance of 11000 km along the ground from the epicenter. On reaching the core, the S-waves disappear and the P-waves are refracted. Due to this, no wave reaches 5000 km after 11000 km from the epicenter of the earthquake.

This region is called the shadow zone.

Waves produced by intra-oceanic earthquakes are called tsunamis in Japan.

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