Tag: seismic waves and tsunami

The outermost layer of the Earth is called as crust. It is not in one piece but fragmented. Each fragment is called as a plate. Such 7-8 major plates are present. Also, there are many minor plates. These plates are in continuous motion. When these plates brush past one another or a plate goes under another, it causes collision. This causes earthquake on the surface of the Earth. Earthquakes occur all the time around the world. But they are too small to be noticed. Major earthquakes are less frequent. Hence, given statement is true.

Earthquakes can causes floods, landslides and tsunamis, Earthquakes occurs all the time, all over the earth but at very less magnitude & earth's plates are in continual motion.

A seismograph is a device that measures and records the seismic waves moving through the earth post an earthquake.

Seismic waves move through the Earth as the result of earthquakes.

The layer below the Earth's crust is known as mantle. This consists of magma.

The Earth's crust is not a huge single piece rather it is in many pieces or fragments. The fragments are called plates.

Storms, cyclones, earthquakes and lightning are termed as natural calamities. These causes lot of damages to the properties and enviroments. Hence, they are destructive in nature.

Due to movement of Earth's plates, most of the earthquakes occur.

Earth's plates or tectonic plates are always in motion. They continuously move and sometimes collide with each other.

On 26th January, 2001, an earthquake occurred in Bhuj district of Gujarat at a very high frequency on Richter scale.